The O'Neill boot line continues to impress and reflect the expertly designed features and attention to detail you have to come to expect from O'Neill. 5mm Minimal seam deisgn TB3 & TB3X Taped Internal seams Fluid Seam Weld Exterior Arch Strap Heel Pull Split Toe Washing instruction: Rinse with cool water and drip dry out of direct sunlight TECHNOBUTTER 3 NEOPRENE O'Neill's exclusive new pre-stretched neoprene with featherlight, ENVY foam rubber core. Ultimate, flexibility, warmth and comfort. Built to last. SINGLE FLUID SEAM WELD O’NEILL’S EXTERIOR FLUID SEAM WELD is a revolutionary seam construction that utilizes a non-chafing high-grade, silicone-based urethane applied in liquid form to outside of a glued and blindstitched seam completely blocking out water without restricting flexibility.