The Injinji Unisex Ultra RUN Crimson No-Show Socks offer maximum comfort and durability for any your ultramarathon or long-distance training runs. These midweight socks are built with terry cushioning in the heel and toes for enhanced comfort while the separated toe design prevents blisters or chafing. As an added benefit, mesh panels and CoolMax® fibers work to keep feet cool and dry throughout your run.