HMK Voyager Men's Boots (Black, Size 8) Waterproof, windproof, breathable with a SympaTex waterproof breathable membrane Comfort rated to -40 degree Celsius with a 10 to 1 heat retention factor Intuition closed cell foam liner (heat moldable for custom fit) Aggressive lug outsole offers excellent traction and stability Reinforced toe cap, heel counter and side panel for increased durability