What to Wear on Race Day: A Head-to-Toe Checklist for Runners

On race day, dress for conditions about 15 to 20 degrees warmer than the actual temperature, and wear nothing you have not already run in. Those two rules settle most of what goes on your body race morning. You will feel much warmer a mile into the race than you do standing in the corral, so the outfit that feels right at the start line is usually one layer too much.

Feetures socks have been sold in run-specialty stores for more than twenty years, and the same race-day problems come up every season. Runners shiver in the corral and then overheat by mile 8. Seams rub in spots nobody expected, and blisters turn up late in a race in a sock that had never been worn that far.

Add 15 to 20 degrees to the forecast

Look up the forecast, add 15 to 20 degrees, and dress for that number instead of the real one. That is the standard guidance runners get for dressing to run outside. It works because running makes a lot of heat. Most of the energy your muscles burn during exercise comes out as heat rather than motion. That is why a jacket that feels right in the parking lot feels like too much by mile two.

How much you add depends on your pace and on how long you will be out there.

Your pace. The faster you run, the more heat you make. If you are racing hard, dress as though it were warmer than the forecast says, which means wearing less. If you are running easy, taking walk breaks, or finishing a marathon closer to five hours, you are making less heat and staying out longer. Dress closer to what you would want standing still.

The clock. For any race longer than about an hour, look up the forecast for the middle of your race rather than the start.

Do one last check at the start line. If you are comfortable standing still, you are wearing one layer more than you want.

What to wear on race day by temperature

These are starting points for each temperature, before you account for rain, wind, sun, or your own tolerance. They follow the temperature-by-temperature guidance most race-day guides use along with Amanda Brooks's recommendations for cold starts, with mittens rather than gloves for the coldest races.

 

Your legs handle cold far better than your hands, ears, and core do, so they stay comfortable across a much wider range of temperatures. That wide range is why the bottom half comes down to preference more than any other part of the outfit. Plenty of runners race in shorts below freezing, and plenty of others want tights at 40 degrees. Decide yours on how cold your legs get on training runs in similar weather.

When the forecast spans two rows

Say your half marathon starts at 38 degrees and the forecast has you finishing around 60 degrees. Pick the row for the middle of the race, which is the 40 to 49 degree row, and build the outfit there: a short-sleeve technical shirt and shorts. Then handle the cold start with pieces that come off. Gloves you can drop, an ear band, and an old sweatshirt you leave at the gun cover the first two miles, and by mile 5 you are dressed for the weather you are actually running in.

Dressing for 38 degrees instead means a long-sleeve top you are carrying or regretting at mile 9. When the spread is wide, the shirt belongs to the middle of the race and the extras belong to the start.

What to change for rain, wind, humidity, and sun

Wind pulls heat away from any skin you leave uncovered, and the colder and windier it is, the faster that happens. Dress your top half and your hands for how cold it feels rather than what the thermometer says, especially if the course has exposed stretches.

Cold hits your hands and ears first, because blood flow concentrates in your core and leaves the ends of you exposed. Cover them in any cold race. Covering your head helps too, though not because your head loses more heat than the rest of you, which is a myth.

Rain changes more than wind does. Wet clothing pulls heat out of you faster, and it makes holding your body temperature harder. One race-day guide estimates that cold rain makes conditions feel roughly 20 degrees colder. That is a two-row shift in how it feels, though what you do about it is add a shell and a brim rather than move two rows up the chart and race in tights.

For example, take 45 degrees. If it is dry, that means a short-sleeve shirt, shorts, and gloves you can throw away once your hands warm up. If it is raining, the same 45 degrees calls for a brimmed running cap to keep water out of your eyes and a light water-resistant shell over your race top. Skip anything that soaks up water, and keep cotton out of the whole outfit, because it holds moisture and dries slowly.

Cold rain also changes the usual advice about shedding layers. Say you start in an extra layer and drop it at mile 6 because you feel warm, and then the rain starts at mile 10. You have nothing left to put on, and once you are wet and cold you will not warm back up while you are still running. So in a cold rain, a light shell you keep on beats a warm layer you throw away at mile 6.

At the warm end of the chart, humidity is the thing to watch. Rain makes a race feel colder, and humidity makes one feel hotter. Sweat is how you cool down, and humid air slows how fast it evaporates, so a humid 72 degrees is a harder race than a dry 72 degrees. Dress as though it were a row warmer.

Sun and cloud cover matter at every temperature. Full sun on an exposed course makes 45 degrees feel closer to the row below it, while an overcast 45 degrees feels like what the thermometer says, so sunglasses and a brim earn their place at 45 degrees as much as at 65 degrees. Sunburn is a separate question from temperature. Put on broad spectrum sunscreen of SPF 30 or higher, about an ounce, roughly 15 minutes before you leave, including the spots runners forget: the ears and the back of the neck. Nobody reapplies mid-race, so a long race in strong sun is an argument for a shirt with sleeves.

What you can take off once you warm up

Anything you might shed has to be something you can carry. If you cannot carry it, do not start in it.

Gloves fold small and tuck into a waistband. Arm sleeves push down to your wrists and come off over your hands without stopping. A thin hat stuffs into a waistband too.

Shells and long-sleeve shirts are the hard ones. A jacket tied around your waist bounces and rubs for the rest of the race. Either keep it on or leave it in the gear bag.

Your head-to-toe race day checklist

• Top. A technical shirt, singlet, or tank that moves moisture, with flat seams at the shoulders.

• Bottoms. Shorts, capris, or tights with a waistband that stays put.

• Sports bra. Flat seams and a moisture-wicking fabric.

• Socks. A pair that sits smooth under your arch with no slipping at the heel.

• Shoes. The pair you trained in, laced the way you always lace them.

• Hat or visor. Sun off your face in heat, ears covered in cold, a brim in rain.

• Gloves. A throwaway pair works when it is mild. In a cold race, wear moisture-wicking gloves and tuck them into your waistband once your hands warm up. 

• Sunglasses. For sun, and for keeping rain out of your eyes.

• Arm sleeves. Long sleeves you can push down mid-race without a gear bag.

• Watch. Charged, with your race screen already set.

• Bib. Pinned to the layer you will finish in.

• Anti-chafe balm. On every spot that has ever rubbed, before you get dressed.

• Sunscreen. Applied 15 minutes before you leave, ears and neck included.

• Fuel storage. Pockets, a belt, or a handheld bottle, already loaded with what you plan to take.

What socks to wear on race day

Your sock sits between your skin and your shoe. As your feet sweat, that extra moisture increases the friction between your skin, sock, and shoe, and enough friction over enough miles is what causes a blister. So a race sock has two jobs: move moisture away, and stay exactly where you put it.

Cushion level, height, and compression

There is no single right amount of cushioning. Some runners want more underfoot for a long race, and others prefer a thinner sock because they like feeling connected to the ground. Both are legitimate choices, and what feels best to you is a real deciding factor.

Three things inform the decision. The first is how much room your race shoes have, since a thicker sock takes up space and a snug shoe gets snugger. The second is how long you will be out there. The third is what you have been training in. We go deeper in how to choose the right sock cushion level and should running socks be thick or thin.

Height is an easier call. For a road race, a Tab height is all most runners need, and a Tab adds padding right where the back of the shoe meets your heel. Go with a Quarter or Crew height for a trail race, for a cold race, or if your shoe collar has ever rubbed your ankle. Our guide to sock lengths walks through each one.

Compression socks and calf sleeves are fine to race in if you already train in them, and race day is the wrong day to try them for the first time. If you are deciding when they help most, we cover wearing compression before, during, or after a run.

What the sock is made of

Race in synthetic or Merino, and keep cotton out of it. Cotton soaks up moisture and holds it against your skin, which is the condition that turns ordinary rubbing into a blister. Synthetic fibers move moisture away instead, and they are the simplest choice for most races. Your feet keep sweating for the whole race, so the sock has to keep moving that moisture for the whole race. Our Elite and High Performance socks pair iWick® moisture-wicking fibers with mesh ventilation to keep doing that.

Merino works across the whole chart rather than only at the cold end. Wool regulates temperature in both directions, keeping feet cooler when it is warm and warmer when it is not, and it earns its place in a wet race because wool holds about a third of its own weight in moisture before it feels wet and still feels warm on your skin when it is damp. Our Merino 10 socks are knit in North Carolina from Merino wool blended with TENCEL™. If your race is a cold one, start with our winter running socks.

Fit, seams, and the heel tab

A sock that is too big wrinkles under your arch and slides at your heel. A sock that is too small pulls across your toes. What you want is a sock that stays exactly where you put it for the whole race. On our Elite socks, patented Targeted Compression hugs and supports the arch to help keep the sock in place, in an anatomical left- and right-foot design.

The toe seam sits right where the shoe presses down on your toes. A Seamless Toe joins the fabric flat there instead of leaving a stitched ridge, which helps reduce friction. At the heel, a Blister Tab adds a double-thick layer of fabric where the back of the shoe rubs, and it is standard on every Tab height. And when you buy your next pair of shoes, try them on wearing the socks you actually run in, because the sock is part of the fit.

Where runners chafe, and what to do about each spot

Chafing works the same way blisters do. Friction causes it, and damp skin makes it worse by letting fabric slip and drag. The fix is some mix of a lubricant, a better fit, and a fabric that does not hold water. Use more balm than feels necessary, because a four-hour race is a long time for a small hot spot to get worse.

• Inner thighs. The most common spot in shorts. Balm before you get dressed, plus shorts with a liner or a longer inseam.

• Underarms. Balm, and a top with flat seams rather than raised ones.

• Chest and nipples. Balm or tape. A snug technical shirt helps too, since a loose wet shirt moves around more.

• Sports bra band and straps. Run balm along the band line and under the straps.

• Waistband and straps. Balm where the band sits, and shorts that stay put. Heart rate straps, hydration belts, and race packs all create new rub points, so cover those lines too.

• Feet. The sock and the shoe handle this together, though balm on a spot that always bothers you is fine.

Throwaway layers and where the bib goes

You may be standing in your corral for an hour or more before you actually run, and standing still in race clothes on a cold morning is miserable. Wear a throwaway layer over your race outfit. An old sweatshirt, old sweatpants, or a cheap pair of gloves all work, and so does a trash bag with holes cut for your head and arms. In a genuinely cold race, keep the gloves you actually want to run in and drop something else instead. Check your race's information page for where to leave them, since each race sets its own rules for what it collects at the start and what happens to it afterward.

Pin your bib to the shirt you plan to finish in, not to the sweatshirt you are dropping at the start. Races require you to wear your bib on the outermost layer and keep it clearly visible at all times, and they prohibit folding, cutting, covering, or altering it. A timing tag sits on the back, and creasing the bib can damage that tag, which means your time may not record. Pin all four corners so it does not flap.

Gear check and what you will want at the finish

Your ability to produce heat drops quickly the moment you finish, so you get cold fast standing around after a race. Wet clothes that felt fine at mile 20 feel cold within minutes. Pack a dry shirt, dry socks, a warm layer, dry shoes if there is room, and a plastic bag for the wet clothes you take off.

Check your race's bag rules several weeks out, because they vary a lot. Some races only accept their own official bag, some make you register in advance, and some close bag drop the day before rather than race morning. If you skip bag check, look up whether your race hands out a poncho or a heat blanket at the finish.

What changes by distance

What changes with distance is how long you are out there. A 5K takes most runners about half an hour, a half marathon around two hours or more, and a marathon about four and a half hours or more for most of the field. Two runners standing in the same 40 degree weather should dress differently depending on which race they are running.

5K. Dress for the effort and accept being cold at the start. Half an hour is short enough that the weather will not change and you will not slow down much, so 40 degrees means short sleeves and shorts, plus a throwaway layer for the corral.

Half marathon. Long enough for the forecast to move, so build the outfit around the middle of the race. At a steady 40 degrees, that usually means a long-sleeve top or arm sleeves plus light gloves.

Marathon. Dress for the pace you can actually hold and for the fact that you will slow down. Running slower means making less heat, so a 40 degree marathon calls for layers you can manage rather than drop, such as arm sleeves you can push down and gloves you can carry. Our comparison of socks for sprinting versus distance running covers how sock needs change with distance.

Run in your whole race outfit about two weeks out

"Nothing new on race day" covers clothing, not only food. Marine Corps Marathon puts it plainly for first-timers: do not try anything new on race day, whether it is food, hydration, shorts, socks, or shoes.

The way to actually follow that rule is a dress rehearsal. About two weeks before your race, run in the complete outfit you plan to race in: shirt, shorts, bra, socks, shoes, hat, watch, fuel storage, and the same balm in the same places. That leaves you time to replace anything that does not work and still run in the replacement. One detail people miss is that new socks that have never been washed can slide and cause blisters.

Lay everything out the night before

Lay the whole outfit out in one place the night before, in the order you will put it on, with the bib already pinned to the right layer. Include the throwaway layer, the gear check bag, and the sunscreen, and charge your watch. Then check the forecast one more time, because an overnight change of 10 degrees or a chance of rain that was not there yesterday can move you a full row on the chart.

Frequently asked questions

 

Should I race in the shirt they hand out at the expo?

Wear it after the race instead. Event shirts are often cotton, which soaks up moisture and holds it against you, and a shirt you have never run in is the kind of unknown that turns into a rub at mile 9.

What size running socks should I wear for a race?

Sock size follows your shoe size, and Feetures offers four sizes rather than one stretchy size for everyone, which is what lets the sock sit flat on your foot. If you fall between two sizes, go up. Our sock size chart has the full ranges.

What should I do if race morning is colder than the forecast said?

Keep the same core outfit and add pieces you can take off: an ear band, gloves that move moisture away, arm sleeves, and one more throwaway layer for the corral. Swapping your shirt or bottoms on race morning means racing in something you never planned on, and you will warm up 15 to 20 degrees anyway once you start running.

Picking the socks you will race in

If socks are the piece of your race-day outfit you have not decided on yet, they are the easiest one to sort out with a few weeks to go. Our Elite socks come in three cushion levels and five heights, so you can pick the amount of cushioning you like and a height that works with your shoes. Start with our men's running socks or women's running socks. Every pair is backed by our Lifetime Guarantee. Whichever pair you choose, put it through a long run before race day so it is not new to you.