O'Neill's Hyperfreak Fire 3mm Split Toe Boot has been fitted out with O'Neill's most premium wetsuit features including the new, incredibly stretchy TB4 exterior firewall to give you a high-end boot that really performs. The Psycho Techs have been designed with TechnoButter 3 neoprene, a seriously flexible and supple neoprene that uses an Envy Foam core rubber. This means the range of motion in the ankles isn't restricted by stiff neoprene for more responsive, natural feeling surfing all the while keeping you toasty with a generous 3mm neoprene coverage. 

They've also been kitted out with some other features you'd expect in a high-end wettie like TechnoButter firewall and TBX3 interior taped seams with a fluid seam weld on the exterior.