100% Ultraflex RG8Same stretch as UltraFlex DS Material in an environmentally friendly option.F.U.Z.E. Closure SystemFront Upper Zip Entry uses the same zipper technology as our Z.E.N. Zip closure keeping you dry without restricting flexibility.1X Fluid Seam WeldBack Panel Ultraflex FirewallMeasurablt Lighter, warmer and More Flexible (30% More Stretch)Body: 100% Ultraflex RG8 - Back: Smooth Skin UltraFlex FirewallKnee: KryptoNeck: Glideskin