2mm ELASTEK Full Stretch Neoprene at face for added comfort and sealing; Skirt at neck for additional security; Flat seam stitching throughout for maximum flexibility, stretch, and comfort; OMNIRED Technology; 3-Layer Fabric Technology; 4-Way Stretch; 3D Pattern for optimal shape and fit; ExoWear slows thermal loss by 36% at 1ATM of pressure (proven in controlled lab thermal testing)