Rated for water 50 degrees and upn100% stretch neoprene for maximum flexibility in the waternSealed and liquid taped seams keep cold water out while adding durabilitnPoly fleece lining wicks moisture from the skin while adding extra insulationnArch support straps and ankle sealsnPop quiz: what's better frozen, toes or popsicles? If you answered popsicles, give yourself a pat on the back, because you get 10 points and a pair of the Quiksilver Cypher 3mm Split Toe Men's Booties. They're made of quick-drying 3mm Biofleece neoprene to keep your feet from getting icy, have a hook-and-loop strap for a snug fit, and use a dual seal treatment and Beadlock ankle grippers to increase waterproofing and prevent flushing. There's a soft textured sole, too, to protect your feet from sharp rocks and increase traction on your board.