Whether you're a newbie looking for flexibility or a hardened camper who'll be in a range of climates, the Heatseeker Eco-lined Dolomite One Bag is the 3-in-1 marvel you're searching for.Top layer features 50-degree-rated synthetic insulation for versatile use in warmer weatherMid layer features 30-degree-rated synthetic insulation for cool nights in the outdoorsThe two layers can be paired to get a 15-degree bag for maximum versatilityZippers open from the bottom to allow for extra ventilationWatch pocket includedRectangular shape is super roomy for a super-comfortable experienceComfortable fleece lining on the mid layer is super soft and makes you want to slide right into the bag