The Rab Neutrino 400 Down Sleeping Bag is the ultimate companion for your spring and summer mountaineering, backpacking, and bikepacking trips. Weighing just 1 lb. 11.34 oz., this lightweight sleeping bag offers a high warmth-to-weight ratio, making it easy to pack without sacrificing comfort.
Constructed with 20-denier Pertex® Quantum recycled ripstop nylon, this sleeping bag features a fluorocarbon-free durable water repellent (DWR) finish. The 800-fill-power European goose down insulation, treated with Nikwax hydrophobic technology, ensures you stay warm even in damp conditions. Enjoy the benefits of the weight-saving chevron baffle design that reduces down migration and optimizes core warmth.
The tapered mummy shape and trapezoidal box-wall construction maximize loft, while the close-fitting adjustable neck baffle minimizes heat loss. The YKK 3/4-length zipper is designed with a synthetic-filled baffle to trap warmth effectively. Plus, the angled footbox allows for a more relaxed sleeping posture. Included are a zippered storage sack with a water-resistant base and a waterproof roll-top compression sack for easy transport.
This sleeping bag is perfect for those looking to buy a down sleeping bag for spring camping, with a tested comfort rating of 30°F and a lower limit of 19°F, making it suitable for various conditions. Experience the freedom of movement and warmth with the top-rated sleeping bags for bikepacking trips.
Katie Salazar (verified owner) –
I recently took the Rab Neutrino 400 on a weekend backpacking trip, and I couldn’t have been happier. It kept me warm even when temperatures dipped, and it packs down so small! Highly recommend it for anyone looking for the best lightweight sleeping bag for backpacking.
Keith Bennett (verified owner) –
The Neutrino 400 is an absolute game changer! I’ve used it for spring camping multiple times, and the warmth-to-weight ratio is impressive. Plus, the waterproof compression sack makes it easy to carry.
Tammy Pollard (verified owner) –
As someone who loves bikepacking, I can confidently say this is one of the top-rated sleeping bags for bikepacking trips. It’s lightweight, warm, and compresses well—perfect for my adventures.