Running clothing and chafing: fit, dry, fewer seams

Start with fit and friction

Running clothing should let you move without restriction and avoid repeated rubbing. A base layer should wick and dry quickly; shoulders, armpits, chest, inner thighs and ankles are common chafe points. Seams, labels, hard zips and loose cuffs can become problems over a long run. Tighter is not automatically better and looser is not automatically comfortable; the test is whether movement causes continuous rubbing or excess shifting.

Do not wear new clothing for the first time in a race. Try it on a short run, wash it once and check seams and labels; use anti-chafe balm, tape or a smooth base layer on prone areas. Sports bras should provide stable support and shoulder straps that stay put; the right design varies between runners.

Hot and cold layers

In heat, choose light, breathable clothing, light colours or reflective details to reduce heat load and improve visibility; soaked cotton becomes heavy, clings and increases friction. In cold, use layers: a wicking base, an insulating layer and a wind/rain shell, adding or removing as temperature, wind and effort change. NPS winter advice emphasises avoiding cotton next to the skin and carrying extra warmth and rain protection. Running generates heat, so overdressing can also cause heavy sweating and later chilling.

Gloves, a hat, neck gaiter and waterproof outer layer can be carried as conditions require; trail and long runs may also have mandatory kit. Dark clothing is hard to see at night, so add reflective material or active light.

Blisters and broken skin

The NHS notes that friction blisters are common with poorly fitting shoes and in moist, warm conditions. Most heal within about a week; do not burst them yourself. Keep the area clean, cover it with a soft plaster or padded dressing and stop wearing the shoe that caused it. Seek medical or foot-care advice for a very large or painful blister, or if a burst blister becomes red, hot, swollen or produces pus.

Keep feet dry before a long run, choose well-fitting shoes and moisture-wicking socks, and remove grit from the shoe. Calluses are not proof of good adaptation. Running on broken skin increases infection risk and can change your gait.

Washing and replacement

Dry sports clothing thoroughly and avoid fabric softener, which can clog wicking fibres. Remove insoles and air shoes without direct heat. Replace clothing when it becomes stiff, torn, loses elastic or keeps rubbing. Gear does not need to be the newest, but broken seams and failed waterproof layers reduce protection.

Scope and limits

This page does not recommend a brand or fabric or diagnose skin infections or foot structure. People with diabetes, circulation problems, reduced sensation or recurrent blisters should check their feet carefully and seek professional advice.

Sources and scope

Winter layering, avoiding cotton next to the skin and carrying extra warmth follow NPS winter hiking tips; the friction cause, healing time and advice not to burst blisters follow the NHS blisters page. Clothing choice varies with weather, effort and individual fit. Checked 2026-10-28.