Built with hand-laid premium rubber over 3.5mm neoprene core for a flexible, waterproof, and scent free boot. Active Fit with adjustable neoprene gusset for easy on/off and a secure fit. Insulated with 800g of Thinsulate for a comfort zone of -50 to 40 degrees.

Features:Hand-laid premium rubber over a 3.5mm neoprene core;Flexible, waterproof, and scent free boot;Active Fit adjustable neoprene gusset;Insulated with 800g of Thinsulate