Our Sierra Socks line of Coolmax, Rayon from Bamboo, and Combed Cotton Diabetic Socks feature a non-binding top (cuff). What makes Coolmax, Bamboo and Combed Cotton so special?

Coolmax is a type of moisture-wicking technical fabric. The fabric employs specially-engineered polyester fibers to improve “breathability” compared to natural fibers like cotton. This technology is designed to ‘wick away’ moisture from the skin through capillary action and increased evaporation over a wider surface area.

BAMBOO
Bamboo (derived from Rayon fiber) is naturally soft and smooth to the touch – so soft – the comfort is hard to beat. For those who like an ultra-soft silkier feeling sock, our bamboo woven sock is a must.

COMBED COTTON
Combed Cotton is a softer version of regular Cotton, made by treating the Cotton fibers before they are spun into yarn. Because Combed Cotton requires more work and results in a higher quality, it becomes a more durable product.