100% Super Stretch. Light limestone based neoprene. Light Warm Soft More Stretch easy to put on and take off and allows for more freedom of movement. DOPE DYED Fabric have a softer eco friendly anti fade fabric made by Bluesign approved mills. Tailored fit which is anatomically correct engineered body lines with minimal seams for unrestricted warmth and performance. Short back zipper features the Thermal Flush Barrier entry which blocks out water for maximum warth. Flatlock seams. Spuratex tm knee pads are abrasion resistant for flexibility and strength. Glideskin on the neck seals to skin to prevent flushing. Easy access secure key cord.