Reposhing this item I purchased from @meagieb. Love them but they run small, did not use, in same condition as when purchased. Questions? Leave a comment below! 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. Best for water temperatures: 48°–55° F/9°–13° C. Made in a Fair Trade Certified™ factory.