
Current price is USD$279.95
Price when purchased online
Out of stock
How do you want your item?
Out of stock
About this item
Product details
Specifically designed for those who sleep on their sides, the patent pending 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. Our Women's specific bags differ in shape and fill weight with a less drastic taper from shoulders, to hips, to feet - reducing cold spots and creating more warmth where it counts. FEATURES:- * Our Women's bags are designed to contour to your figure for the most thermally efficient and comfortable night's sleep * Specifically designed for women who sleep on their sides with a technical fit, patterned to move with you as you roll from one side to the other * Close fitting, jacket-style hood keeps insulation close to the body without sacrificing mobility * Keep pillow in place with unique Pillow Barn made of stretch mesh material with interior access from either side for easy adjustment * Optimized warmth and minimized pressure points with body mapped insulation * Improved shell fabric and lining with PFC-free water repellent finish * Down fill with a PFC-free water repellent finish throughout the bag provides lofty warmth while synthetic insulation helps alleviate common pressure points in the hips and feet * Optimized fit and thermally efficient footbox is patterned to mimic the shape of your foot position while lying on your side * Smooth, quick zip with anti-snag locking zipper with no draft zipper garage, and long, ambidextrous zipper * Easily adjust hood without unzipping using low-profile internal cordlock access * Seal out drafts by cinching insulated tube along upper hood opening * Hang dry or store bags with exterior loops * Storage sack & stuff sack included Specs:- Petite Total Weight: 2lb 7oz Fill Type: 650 DownTek™ + FireLine™ Eco Total Fill Weight: 22oz Compressed Bag Size: 7" x 8" Stuff Sack Size: 14L 8" x 17.5" Max User Height: 5' 6" Shoulder Girth: 56" Hip Girth: 54" Foot Girth: 31" Regular Total Weight: 2lb 10oz Fill Type: 650 DownTek™ + FireLine™ Eco Total Fill Weight: 24.5oz Compressed Bag Size: 6" x 7.5" Stuff Sack Size: 14L 8" x 17.5" Max User Height: 6' Shoulder Girth: 58" Hip Girth: 56" Foot Girth: 33"
W's Sidewinder SL 20 (650 DownTek) REGULAR
info:
We aim to show you accurate product information. Manufacturers, suppliers and others provide what you see here, and we have not verified it.
Specifications
Sleeping bag type
Mummy Sleeping Bags
Fill material
Down
Weight
2 lbs
Features
Water-Resistant
Warranty
Warranty information
Please be aware that the warranty terms on items offered for sale by third party Marketplace sellers may differ from those displayed in this section (if any). To confirm warranty terms on an item offered for sale by a third party Marketplace seller, please use the 'Contact seller' feature on the third party Marketplace seller's information page and request the item's warranty terms prior to purchase.
Similar items you might like
Based on what customers bought
Naturehike Ultralight Down Sleeping Bag, 650FP Backpacking Sleeping Bag for Adults $128.99
$12899current price $128.99Naturehike Ultralight Down Sleeping Bag, 650FP Backpacking Sleeping Bag for Adults
Best seller Coleman Montauk 40?F Big and Tall Sleeping Bag $46.92
Best seller
2 optionsAvailable in additional 2 options$4692current price $46.92Coleman Montauk 40?F Big and Tall Sleeping Bag
1394.4 out of 5 Stars. 139 reviewsFUNDANGO 2 Person Sleeping Bag with Pillows for Adults Black Double Camping Sleeping Bags 220*150cm, Queen Size Two Person Sleeping Bags with Compression Sack 39.2°F-62.6°F, 6.1lbs, Black $44.99 Was $49.99
$4499current price $44.99, Was $49.99$49.99FUNDANGO 2 Person Sleeping Bag with Pillows for Adults Black Double Camping Sleeping Bags 220*150cm, Queen Size Two Person Sleeping Bags with Compression Sack 39.2°F-62.6°F, 6.1lbs, Black
3794.4 out of 5 Stars. 379 reviewsColeman Montauk 20?F Big and Tall Sleeping Bag $58.77
2 optionsAvailable in additional 2 options$5877current price $58.77Coleman Montauk 20?F Big and Tall Sleeping Bag
2714.6 out of 5 Stars. 271 reviewsCold Weather Mummy Sleeping Bag, Olive Green $210.55
$21055current price $210.55Cold Weather Mummy Sleeping Bag, Olive Green
Kelty Cosmic 20 Down Mummy Sleeping Bag for Backpacking, Campers, 550 Fill Power, Recycled Fabrics with PFAS-Free DWR, Designed in Sunny Colorado $169.95
4 optionsAvailable in additional 4 options$16995current price $169.95Kelty Cosmic 20 Down Mummy Sleeping Bag for Backpacking, Campers, 550 Fill Power, Recycled Fabrics with PFAS-Free DWR, Designed in Sunny Colorado
45 out of 5 Stars. 4 reviewsMidwayUSA Military Style 4-Piece ECWS -15 Degree Sleeping Bag System $219.99
$21999current price $219.99MidwayUSA Military Style 4-Piece ECWS -15 Degree Sleeping Bag System
193.7 out of 5 Stars. 19 reviewsGEERTOP Flannel Sleeping Bags for Adults Big & Tall People Portable Cold Weather Envelope XXL All Seasons Camping Sleeping Bag $59.99
$5999current price $59.99GEERTOP Flannel Sleeping Bags for Adults Big & Tall People Portable Cold Weather Envelope XXL All Seasons Camping Sleeping Bag
Bedroll, Natural $199.99
$19999current price $199.99Bedroll, Natural
The North Face Eco Trail Bed 20 Sleeping Bag $90.00 Was $119.00
$9000current price $90.00, Was $119.00$119.00The North Face Eco Trail Bed 20 Sleeping Bag
224.6 out of 5 Stars. 22 reviewsBedroll, Natural$$Sport & Recreation Other $229.99
$22999current price $229.99Bedroll, Natural$$Sport & Recreation Other
Double Sleeping Bag for Adults Machine Washable 2 Person Camping Sleeping Bag Queen Size Waterproof with Compression Sack for Cold Weather 3-4 Seasons $104.98
$10498current price $104.98Double Sleeping Bag for Adults Machine Washable 2 Person Camping Sleeping Bag Queen Size Waterproof with Compression Sack for Cold Weather 3-4 Seasons
Zero Degree Sleeping Bag for Adults Cotton Flannel Tall and Big - 84" x 40" Right Zip, 0F Black $87.97
$8797current price $87.97Zero Degree Sleeping Bag for Adults Cotton Flannel Tall and Big - 84" x 40" Right Zip, 0F Black
Compact Hooded Sleeping Bag for Travel - 2-in-1 Design as Blanket, 700g, Packable $18.59
2 optionsAvailable in additional 2 options$1859current price $18.59Compact Hooded Sleeping Bag for Travel - 2-in-1 Design as Blanket, 700g, Packable
Survival Sleeping Bag Bivvy Portable Waterproof Windproof Lightweight Compact $22.18
2 optionsAvailable in additional 2 options$2218current price $22.18Survival Sleeping Bag Bivvy Portable Waterproof Windproof Lightweight Compact
Cold Weather Sleeping Bag for Adults 0 Degree with Pillow Extra Large Flannel Winter Camping Zero Degree $89.98
$8998current price $89.98Cold Weather Sleeping Bag for Adults 0 Degree with Pillow Extra Large Flannel Winter Camping Zero Degree
Frontcountry Bed 20F Deg Reg $287.90
3 optionsAvailable in additional 3 options$28790current price $287.90Frontcountry Bed 20F Deg Reg
15 out of 5 Stars. 1 reviewsMountain Warehouse Lightweight Winter Mummy Sleeping Bag $174.20
2 optionsAvailable in additional 2 options$17420current price $174.20Mountain Warehouse Lightweight Winter Mummy Sleeping Bag
0 Degree Sleeping Bag for Adults - Cotton Flannel 4 Season Cold Weather Winter, XXL Big and Tall Camping Sleeping Bag with Compression Sack $125.98
$12598current price $125.980 Degree Sleeping Bag for Adults - Cotton Flannel 4 Season Cold Weather Winter, XXL Big and Tall Camping Sleeping Bag with Compression Sack
Customer ratings & reviews
How item rating is calculated
Filtered and sorted results would be available on the new 'Customer ratings & reviews' page.
Sort by |
Showing 1-3 of 8 reviews
Dec 24, 2025
Klaudia
5 out of 5 stars review
Seller Verified Purchase
I like this product very much.
Haven't usted it yet outside but it feels wonderful. It's light and warm.
International review
Review from Big Agnes, Inc. CA
Helpful?3HVLFY6AQMME2900937997
Oct 15, 2023
Red Penny
5 out of 5 stars review
Seller Verified Purchase
Stoked on this bag
I spend a lot of time in the bush and was ready to upgrade a bag that never fit particularly well and wasn't as warm as I wanted it to be. I had prioritized ultralight and honestly found it frustrating as having a good sleep is more important than a couple of grams. So although this is bigger, I am so grateful for the room, the side sleeping feature and the increased warmth as a woman who tends towards being cold.
International review
Review from Big Agnes, Inc. CA
Helpful?3HVLFY6AQMME2900937997
Jul 25, 2025
Kayla
5 out of 5 stars review
Cozy and Perfect
I took this on my first backpacking trip and I loved it. The sleeping bag is spacious, comfortable, and warm without taking up too much space in a pack.
Review from Big Agnes
Helpful?3HVLFY6AQMME2900937997





