The Switch 20 by Mountain Hard wear uses warm Thermic MX that compresses easily and a face gasket seals in warmth. The Mountain Hardwears exclusive Quantum expander allows you to increase bag girth by 8. The Switch 20 is an outstanding choice in cold to moderate temperatures where moisture and compressibility are issues.
Quantum Expander allows user to adjust girthfor comfort and thermal efficiency
Comfort mummy cut maximizes warmth without constriction
Comfort footbox allows for natural foot position
Face gasket and tailored hood seal in the warmth on a cold night