Sidewinder 0˚

$257.97 ~~$449.95~~ In stock

Specifically designed for the over 60% of people who sleep on their sides, the second generation of our patented Sidewinder side sleeper technology ensures warmth, comfort, and ease of use in any position you settle into. Constructed for comfort, with additional body mapped insulation to optimize warmth where you need it and provide cushioning and support at the hips and shoulders, easing pressure points and other ‘side effects’. The Sidewinder is a side sleeper’s dream bag with technical features that roll seamlessly from one adventure to the next, and from one side to the other at night. U.S. Patent 11957260 B2

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United States · Return window (days after delivery): 30. Return method: By mail. Return postage: Seller pays.

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Customer Reviews (5.0 / 5 · 5 reviews)

Joseph ★★★★★ Aug 22, 2026

I’m a side sleeper and constantly wake up with my shoulder aching in regular mummy bags, but this one actually lets me bend my knees and stay comfortable all night. The patented side-sleeper cut makes a real difference, and I stayed warm even when I shifted positions.

Michael M. ★★★★★ Aug 21, 2026

The zipper on this bag is so cleverly positioned that I can actually shift onto my side without wrestling with the fabric every time. It's the first sleeping bag that doesn't leave me feeling claustrophobic when I roll over, and the warmth stays put even in my favorite curled-up position.

Hazel V. ★★★★★ Aug 19, 2026

I toss and turn all night in regular mummy bags, but this one's side cut actually lets my shoulder and hip sink in naturally without that cramped feeling. The zipper pulls smooth and the hood adjusts easily even when I'm half-asleep, which makes a huge difference on multi-day trips. Warm enough for