Made with Natural RubberStretchy 85% Yulex® natural rubber/15% chlorine-free synthetic rubber by polymer content; natural rubber is FSC® certified by the Rainforest AllianceWarm Thermal LiningTorso/thighs have solution-dyed 95% polyester (51% recycled)/5% recycled elastane thermal microgrid lining that dries fast and offers excellent warmth and flexHigh-Stretch Recycled Polyester and Water-Based GlueStretchy, solution-dyed linings; interior arms/legs: 100% recycled polyester, exterior: 85% recycled polyester/15% recycled elastane. Solvent-free AquaA™ glueFully Seam-Sealed100% externally seam-sealed to shut out water and add durability; all seams are triple-glued and taped with comfortable, low-profile interior seam tapeFront-Zip DesignAsymmetrical front-zip with replaceable, corrosion-proof Salmi® zipper provides better seal and extends suit’s lifespan; easy-access key loop on insideFlexible and Durable Kneepads and CuffsSupratex kneepads and cuffs are durable, flexible and hold comfortably to the body without binding or restricting movement Patagonia R2 Yulex Front Zip Black