From Patagonia

For reliable warmth in winter conditions, these wetsuit mitts are made from stretchy, 5mm 85% Yulex natural rubber/15% synthetic rubber by polymer content, with 100% external seam sealing and a textured palm for grip. Best for water temperatures: 3848 F/39 C. Fair Trade Certified sewn.

• Stretchy 85% Yulex natural rubber/15% synthetic rubber by polymer content; the natural rubber is Forest Stewardship Council certified by the Rainforest Alliance; the synthetic rubber is chlorine-free
• Stretchy, solution-dyed linings; interior: 100% recycled polyester jersey; exterior: 88% recycled polyester/12% recycled spandex; lining and exterior fabrics laminated with solvent-free AquaA glue
• 100% external seam sealing; all seams are triple-glued, blindstitched and internally taped at high-stress areas
• Articulated panels conform to hand for a snug fit
• Microgasket at wrist prevents water entry
• Fair Trade Certified sewn, which means the people who made it earned a premium for their labor
• Main: 5mm 85% Yulex natural rubber/15% synthetic rubber by polymer content, lined with 100% recycled polyester
• Exterior: 88% recycled polyester/12% recycled spandex