Fixed-Fit multi-layer inner boot system featuring: · Thermawick™ soft, next-to-foot wicking layer for warmth · Form-fitting B-Tek™ Foam lining for comfort · B-Tek™ Heat lightweight, 4-channel hollow-fibre insulation for high-loft breathability in a broad range of temperatures · Fixed frost plate returns heat and reflects cold for temperature regulation · Waterproof breathable membrane with booty construction for regulated wet protection · Comparable to 400g insulation, for dependable cold-weather protection
