Best for water temperatures: 48°55°F / 9°13°C Warm, comfortable and durable, these wetsuit booties are made from stretchy, 3mm 85% Yulex® natural rubber/15% synthetic rubber by polymer content, with an internal split-toe design for increased control and grip. Fair Trade Certifiedsewn. 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 Solution-dyed 95% polyester (51% recycled)/5% recycled spandex thermal microgrid interior lining dries fast and offers excellent warmth and flex Stretchy and durable solution-dyed 88% recycled polyester/12% recycled spandex exterior lining; all fabrics laminated with solvent-free AquaAglue 100% external seam sealing; all seams are triple-glued, blindstitched and 100% internally taped Y-strap closure conforms to foot for a snug fit; microgasket at cuff opening prevents water entry Internal split-toe de