The 3mm Equation Boots are the perfect eco-friendly surf booties to keep your feet warm in cold water. They are made with the Eicoprene technology, a non-petroleum based synthetic foam derived from a mix of oyster shell powder, limestone, and recycled tires. To laminate the recycled polyester lining Picture Organic Clothing uses Aqua-A, a solvent-free water-based glue with no harmful chemicals. These booties have glideskin ankle cuffs to minimize water entry, as well as strapless compression panels and a pull tab on heel for easier entry. For enhanced comfort and fit, they have a soft-grip sole and split toe. They also feature glued, blind-stitched, fully-taped seams (GBS) for ample stretch when in the water and dry quickly between two sessions. 3 mm Glideskin ankle cuffs Glued and blindstitched construction (GBS) Pull tab on heel for easier entry Strapless compression panels Softgrip sole Glideskin ankle cuffs Split toe Weight 300 g Materials Main Fabirc: Picture Eicoprene Fabric Mate