Patagonia's warmest wetsuit booties are designed for the most extreme cold conditions, made from 7mm 85% Yulex natural rubber and 15% synthetic rubber with 100% external seam sealing. Ideal for water temperatures between 32°38° F (0°3° C), these booties provide exceptional warmth and comfort, featuring a fast-drying, solution-dyed thermal lining and a custom grip pattern for improved dexterity and board control. Made in a Fair Trade Certifiedfactory, they combine sustainability with high performance. Made from 85% Yulex natural rubber and 15% synthetic rubber Natural rubber is FSC certified by Preferred by Nature Best for water temperatures: 32°38° F (0°3° C) Warm and stretchy solution-dyed lining made from recycled nylon, polyester, and spandex Triple-glued, blindstitched seams with internal taping at high-stress areas Custom asymmetrical grip pattern for improved dexterity and board control Microgasket at cuff to prevent water entry Made in a Fair Trade Certified factory Weight