ECO accessories are constructed from materials at the leading edge of water-wear technology. The ECO Neoprene Sock is an amazingly comfortable and practical solution to improved performance and comfort from your fins. The plush neoprene inner sole and carefully placed seams make for optimal comfort and the printed rubberized pattern on the sole make for improved footing. The neoprene uppers makes for non chaffing and an easy fin fit, accommodating from a size 5 through 12.