Sierra Designs Night Cap Sleeping Bag
Best environmentally conscious option for side sleepers seeking zipperless comfort.
This bag ditches the traditional zipper for an integrated comforter system that feels more like a bed than a restrictive mummy bag. It is an ideal choice for those who prioritize freedom of movement and easy temperature regulation without sacrificing warmth in damp, unpredictable conditions.
$183.00
Who it's for
- Side sleepers and restless movers seeking a less restrictive sleep experience
- Campers who frequently overheat or need quick ventilation during the night
- Eco-conscious backpackers looking for reliable performance in variable weather conditions
Who should skip it
- Ultralight hikers prioritizing the smallest possible pack volume for long treks
- Weight-conscious trekkers who prefer the lightest gear for strenuous mountain ascents
- Cold sleepers who require a fully sealed cocoon in freezing temperatures
Performance breakdown
Freedom of movement
Zipperless design eliminates constriction for a truly natural sleeping position.
Temperature regulation
Self-sealing foot vent offers intuitive cooling without compromising core warmth.
Weight-to-warmth ratio
Synthetic insulation adds bulk, prioritizing durability over ultralight backpacking performance.
Ease of entry
Comforter-style opening makes getting in and out effortless during the night.
Draft protection
Integrated shoulder pockets effectively seal out cold air without restrictive hoods.
Pad integration
Sleeve system keeps the bag centered, preventing midnight sliding off pads.
Key Specs
Temperature Rating
20°F
ISO Comfort Rating
34°F
ISO Limit Rating
20°F
Weight
3.35 lbs
Fill Weight
45 oz
Max User Height
68 inches
Length
74 inches
Shoulder Circumference
59 inches
Hip Circumference
58 inches
Foot Circumference
40 inches
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