Three season boot. Four if you count trips to your local pub. This model has 3D Memo Foam which cushions your foot and helps prevent blisters.
Mammut Sapuen High GTXUpper: Double Layered Engineered Mesh
Lining: Goretex
Outsole: Vibram Flextron II
Heel Drop: 10mm
Weight: 470g (1/2 pair 5.5UK)