3mm Super-stretch Limestone Neoprene; Thermally Efficient Plush lining throughout; Thermal protection technology; Glued and blindstitched construction; Abrasion resistance; Taped seams for comfort; UPF 50+ protection; Di-Guard abrasion protection on back seat and knees; Drainage Holes at ankles allows excess water to escape; Silicon strips at ankle to inhibit water flush; Relief Open (Long John only); 4 way Super- stretch Neoprene; Fabric composition: 90% neoprene / 10% recycled nylon