Low-loft OMNIRED infrared inner fabric; ELASTEK full-stretch neoprene for ankles and calves; Fused cut edges for unrestricted stretch; Heavy-duty sole for added durability and stability; Heavy-duty zipper with wide gusset for easy entry; Durable toe and heel cap; Fin tab to prevent strap movement; Double-glued and blindstitched to eliminate water entry; 7mm neoprene with low-loft OMNIRED inner fabric; ELASTEK neoprene around upper calf with fused-cut edges for comfortable fit