Ideal for temperatures of about 20 degrees Fahrenheit and above, 3-season sleeping bags are best suited for spring and fall trips, as well as summers in the high mountains, when temps can dip below freezing at night. Good three season bags have features to combat cold: cinchable hoods, draft collars, and zipper draft tubes. Learn more with in-depth advice from Backpacker's 3-season sleeping bag reviews.
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An armored shell protects this weather-resistant sleeping bag from all but the worst conditions.