Patagonia R5 Yulex Regulator Round Toe Surf Boots

"Our warmest wetsuit booties for the most extreme cold conditions. Made from 7mm 85% Yulex® natural rubber/15% synthetic rubber by polymer content with 100% external seam sealing. Best for water temperatures: 32°–38° F/0°–3° C. Made in a Fair Trade Certified™ factory."

-Patagonia