The Prolimit Mercury split toe unisex boot with Thermal Rebound (TR) is one of our warmest boots. Inside the boot we've added zodiac 2.0 Lining to keep your feet warm under any condition. The boot has a x-grip sole for perfect grip on uneven surfaces. The split toe allows you to have more balance and control. The seams are triple glued and blind stitched so they are extra strong and watertight. The neoprene of the boot is 5.5Mm thick.