O'Neill Mutant 3mm Split Toe Boot Thr O'Neill Mutant 3mm Split Toe Boots are perfect for any surfer who wants to be protected from the harshest of conditions. The deep split toe gives you better balance on the board and the GB Seams are taped for extra water proofing and heat management. FEATURES Deep Split Toe for Improved Balance Glued and Blindstitched Seams Taped Seams FluidFlex™ Firewall O'Neill Mutant 3mm Split Toe Boot