Range Explained: Rab Sleeping Bags 2026

In this guide, we take a look at the new Rab sleeping bag range. We’ll break down the Mythic, Alpine, and Neutrino bags to help you find one that is best suited to your next adventure.

This range has something for everyone. Whether you’re seeking ultralight performance for quick trips, a robust all-rounder for varied conditions, or extra insulation for more hostile environments, Rab has you covered.

Rab’s sleeping bag range is designed to deliver dependable warmth, efficient packability, and performance in demanding environments.

Each range is built around a different performance priority, helping you choose the right balance of warmth, weight, and packability.

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Which Rab Sleeping Bag Should You Choose?

Each of these down sleeping bags is built to excel in specific conditions. Finding the right bag for you usually comes down to how much weight you want to carry and the elements you’ll encounter on your next trip.

Mythic – One of the lightest sleeping bags Rab has to offer. Made for fastpacking and warmer nights. Choose this if you want a comfortable yet minimal setup that still performs well. Ideal for wild camps and bivy trips.

Alpine - A solid mountain sleeping bag with great all-around performance, even in cold conditions. Choose this versatile bag for a range of adventures.

Neutrino – Built for colder mountain environments and more serious trips. Choose this if you want a technical sleeping bag with an excellent warmth-to-weight ratio for alpine climbing and multi-day missions.

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Mythic Sleeping Bags

Designed for moving fast in the mountains, the Mythic prioritises maximum warmth with minimal weight and pack size. It’s the one you reach for when every gram counts, but you still want reliable insulation overnight.

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Pioneering L.O.F.T 3D™ - Rab uses a clever helix-shaped baffle construction to keep the down evenly distributed to avoid cold spots forming in the night.

Heat-reflective TILT lining - this lining inside the sleeping bag helps minimise heat loss by bouncing heat back towards your body without adding extra bulk.

Sidewall Baffles - These baffles reduce cold spots and ensure you’re not lying on a steam. The lightweight fabrics keep pack size down, while still feeling comfortable enough for proper rest after a long day.

Cinch in hood - Details like the adjustable hood lock in heat, while the cordlocks are positioned away from your face to ensure comfort

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Alpine Sleeping Bags

The Alpine is a versatile mountain sleeping bag designed to balance warmth, comfort, and packability. It’s a dependable choice if you want one bag that can handle colder nights without going full expedition-level.

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L.O.F.T™ construction - The Alpine sleeping bag uses alternating wide and narrow baffles to achieve a great warmth-to-weight ratio and reduce cold spots.

‎Sidewall Baffles - These baffles also reduce warm spots, which can make a big difference if you tend to move around in your sleep, and they also make the bag more comfortable for those who lie on their sides.

Cinch in hood - A well-shaped hood with an insulated collar that sits snug around your neck to stop head escaping when temperatures drop overnight.

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Neutrino Sleeping Bags

The Neutrino range is designed for demanding alpine use, where warmth, weight, and packability are all essential. It’s a go-to option for cold multi-day trips and high-altitude adventures. Perfect for serious mountaineers looking for a technical sleeping bag with exceptional warmth-to-weight performance.

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Longitudinal chest baffles design  - efficiently conserves heat around your torso, where you feel the cold the most.

‎L.O.F.T 3D™ baffle technology - eliminates cold spots, to optimise heat retention, and reduce pack size.

20D Pertex® Quantum fabric at the base of the footbox - this tougher fabric in this high-wear area holds up on rough ground, providing durability while keeping the rest of the bag lightweight.

10D Pertex® Quantum - on the top of the bag, allowing the down to fully loft, helping trap more warm air while still packing down small.

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