3Layer Sleeping System
The lightweight design of this system provides maximum versatility for changing conditions and seasons. The sleeping bag and jacket are changeable components, always used with the bivy sac/bag cover. The waterproof, breathable layer provides protection from moisture and adds warmth to the system. Additionally, the sleeping bag cover helps to hold a jacket in place, adding significant insulation and warmth to the system.
Montbell U.L. Sleeping Bag Cover
Integral Designs eVENT Overbag
Integral Designs eVENT Micro Bivy
The ProMountainSports 3Layer sleep system is designed to be used with ground insulation. We carry a variety of pad systems; please for details/inquiries.
Sleeping on Snow
The importance of sufficient ground insulation cannot be overstated. This is particularly true when sleeping on snow.
Example: A typical hot summer day with daytime highs of 7085°F; camping on snow with overnight low temperatures of 3040°F. Camper A sleeps warm in a 2030 degree bag on a full length 5/8" closedcell pad (weight 18oz). Camper B sleeps cold in a 010 degree bag on a threequarter length 3/8" closedcell pad (weight 9 oz). Which bag and pad combination weighs less?