Patagonia Mens R1 Lite Yulex Long Sleeve Wetsuit Top A stretchy, neoprene-free wetsuit top made of 85% Yulex® natural rubber/15% synthetic rubber by polymer content; the natural rubber is from sources that are Forest Stewardship Council® certified by the Rainforest Alliance. Best for water 65°–75° F/18°–23° C. Fair Trade Certified™ sewn.     Features Made with Natural Rubber Stretchy 85% Yulex® natural rubber/15% chlorine-free synthetic rubber by polymer content; natural rubber is FSC® certified by the Rainforest Alliance Solution-Dyed Recycled Polyester Linings Stretchy, solution-dyed linings; interior is 100% recycled polyester, exterior is 88% recycled polyester/12% spandex Water-Based Glue Is Solvent-Free Linings laminated with water-based, solvent-free AquaA™ glue Flatlock Construction Seams are sewn with flatlock construction for comfort and durability Design Reduces Drag Streamlined pullover design holds close to the body for reduced drag with maximum comfort and flex Rubberized Waist Gasket Adjustable, rubberized waist gasket with cord lock minimizes water entry while providing a more secure fit   Materials Body: 1.5mm 85% Yulex® natural rubber/15% synthetic rubber by polymer content, lined with high-stretch 100% recycled polyester jersey Exterior: 88% recycled polyester/12% spandex Adjustable, rubberized waist gasket with cord lock minimizes water entry while providing a more secure fit