How to choose hiking socks that prevent blisters

Choose wool or synthetic hiking socks, never cotton. Match the thickness to your shoe so the fit is snug but not tight, and carry a spare pair to change into when your feet get damp.

Why not cotton

Cotton soaks up sweat and stays wet. Wet skin rubs, and rubbing makes blisters. Wool and synthetic fabrics move moisture away and stay more comfortable when damp.

Pick by fit

A sock that is too thick in a tight shoe squeezes your foot. A thin sock in a roomy shoe lets your foot slide. Try the exact combination with the shoe you will wear.

What to look for

• Seams that sit flat, with no thick lumps on toes
• A snug fit at the heel and arch, so nothing bunches
• Cushioning in the heel and ball, where you press most
• Height that clears the top of your shoe

One exception

Some people with sweaty feet like a thin liner under a wool sock. The two layers can slide against each other and cut rubbing. Try this on a short walk first.

Carry a spare

A spare pair is the cheapest comfort on a long walk. Change when your feet are damp, and hang the damp pair on your pack to dry. For more on blisters, read how to prevent blisters when hiking. To choose shoes, see hiking boots vs trail runners.

Quick care tips

Wash socks inside out on a gentle cycle, and skip fabric softener, which can reduce wicking. Air-dry them or tumble dry low. Replace socks when they thin at the heel, because worn socks lose cushioning and cause rubbing.