This sporty sock is unique for more than just its shape. Lightweight and thin without sacrificing strength, the Liner CoolMax Crew Sock is an ideal "baselayer" sock or a low-weight, low-friction hiker. Injinji's five-toe design prevents rubbing between toes, stopping on-trail blisters before they start. And CoolMax technology actively wicks and aerates to keep feet chilled on our longest adventures.