Here's what other sites are saying:
Created with three layers of Eco-Synthetic knit in the heel, toe and metatarsal area, the Keen PTC Crew Lite Socks for men offers distinct left and right foot designs for an unsurpassed fit. This sock is specifically designed for anyone who spends most of their day on their feet. Keen also added a seamless construction throughout flex zones to minimize fabric bunching and help prevent chafing.
- Altrec Outdoors refers to the men's version