Go even crazier with a pair of O'Neill Psycho 4/3MM Split Toe Booties this season, for when the water is extra cold, and you need that O'Neill protection you've come to know and love. O'Neill Psycho 4/3 ST Boots sport a fluid seam weld throughout, UltraFlex DS neoprene for warmth, flex, and durability, firewall insulation, and advanced heel cupping and a velcro cinch closure system that assure they'll fit great, every time!
