O'Neill HyperFreak Fire 3mm Split-Toe Boots — the warm-lining boot upgrade for surfers who need cold-water traction without losing feel. Built on O'Neill's HyperFreak platform, the Fire uses a TechnoButter Fire interior lining for extra insulating warmth that kicks in the moment you pull them on. TechnoButter Fire Lining — ultra-plush thermal interior generates and retains body heat; stays warm even after repeated re-entries 3mm Neoprene — optimized for 50–62°F water; enough insulation for winter sessions without going stiff underfoot Split-Toe Construction — separates the big toe to improve rail pressure, grip, and board feedback compared to round-toe boots Glued and Blind-Stitched Seams — sealed construction limits cold-water entry at the seams; durable under repeated surf sessions Grippy Sole — textured rubber outsole provides traction on the board and when walking to the water Anatomical Fit — contoured cut reduces pressure points and dead space that causes cold spots The HyperFreak Fire 3mm is the boot that pairs naturally with the O'Neill HyperFreak 4/3+ or 5/4+ for a complete cold-water system. Available in Black/Graphite, sizes 5–13. Size up half a size if you run between sizes. Rinse with fresh water after each session. Hang dry out of direct sunlight. Do not machine wash or tumble dry.
