O'Neill Wetsuits - O'Neill Womens Mod 6/5/4mm Internal Split Toe Wetsuit Boots - Black :: Unisex > Wetsuits. Split toe design for better balanceMulti-density rubber soleUltralight foxing support systemWomen's wetsuit bootsFluidFlex Firewall neoprene is measurably lighter. warmer and more flexibleThickness: 6/5/4mmVelcro straps for a secure fit to your feet100% sealed glued and blindstitched seams that are also taped in all areas of excessive stress for great durability Size: UK 4,UK 5,UK 6,UK 7,UK 3.