Sleeping Bags, Tents, Pads & Outdoor Gear

Women's Sidewinder SL 20°

Women's Sidewinder SL 20° - Main image
$184.96 $249.95 In stock

Category: BAGS

Specifically designed for those who sleep on their sides, the patented Sidewinder Series was engineered to ensure warmth, comfort, and ease of use no matter which side you’re on. Constructed with features you expect from a traditional mummy bag with additional body mapped insulation to optimize warmth where you need it and minimize pressure points and other ‘side effects’. The Sidewinder SL 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

Before you pay

Check the method and total at checkout.

When it ships

Allow for processing time as well as the journey to you.

Standard Shipping: Handling (business days) 0–1; Transit (business days) 7–15.

Express Shipping: Handling (business days) 0–1; Transit (business days) 7–15.

View policy
If you need a refund

Keep your order number and contact the store to start.

Please contact us for the refund processing timeframe before returning an item.

View policy
Delivery costs

Review the cost for your destination and chosen service.

Standard Shipping · United States: $0.00

Express Shipping · United States: $3.99

View policy
Returning an item

Check the return conditions before sending anything back.

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

View policy

Customer Reviews (5.0 / 5 · 5 reviews)

Joseph ★★★★★

Finally a bag that doesn't twist into a knot when I roll from one side to the other at 3am. The 20° rating is spot on for my chilly apartment, and the patented side-sleeper design actually keeps the fill where it belongs instead of bunching behind my back.

Riley Y. ★★★★★

I'm a dedicated side sleeper and regular bags always leave a cold gap at my shoulder, but the Sidewinder's shape actually stays put when I roll over. The footbox has plenty of room too, so my toes never feel pinched. Two nights in and I'm sleeping straight through again.

Hannah F. ★★★★★

Slept in this on a 30-degree night and stayed warm the whole time without feeling clammy. The footbox has enough room that my feet never felt pinched, which is usually my problem with mummy bags. The zipper didn't snag once, even at 2am when I was half asleep.