Big Agnes Women's Sidewinder SL 20
Big Agnes

Big Agnes Women's Sidewinder SL 20

$249.95 $204.96 Save $44.99
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Women's Sidewinder SL 20°
Women's · Traditional mummy bag designed for side sleepers
Description

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

Fit
Design
Women's specific contoured fit designed for side sleepers, patterned to move with you as you roll
Sizing
Petite (fits up to 5'5" / 165cm) / Regular (fits up to 5'10" / 178cm)
Upper
Shell
Nylon ripstop featuring a water repellent finish without intentionally added PFAS
Lining
Polyester taffeta featuring a water repellent finish without intentionally added PFAS
Primary Fill
650 fill DownTek™ repels water while maintaining insulating value - bluesign® approved water repellent chemistry without intentionally added PFAS
Body Mapped Fill
FireLine™ ECO Synthetic Insulation, 100% post-consumer recycled polyester, featuring low-denier fibers that are tightly woven and provide high loft, compressibility, high weight-to-warmth ratio, and durability
Features
Hood
Close fitting, jacket-style hood keeps insulation close without sacrificing mobility. Low-profile internal cordlock access. Insulated tube along upper hood opening seals drafts
Pillow Barn
Unique stretch mesh material with interior access from either side for easy adjustment
Insulation
Body mapped insulation optimizes warmth and minimizes pressure points. Down fill throughout with synthetic insulation at hips and feet
Footbox
Optimized fit and thermally efficient, patterned to mimic foot position while lying on side
Zippers
Anti-snag locking zipper with no draft zipper garage, long ambidextrous zipper
Compatibility
Works with any pad size or style. Exterior loops for hang dry or storage
Included
Storage sack & stuff sack
Storage
Guidelines
Keep hanging if possible, or in included mesh storage sack. Store in cool, dry place away from heat sources.
Cleaning
Machine Wash
Machine wash WITHOUT AN AGITATOR. Oversized bags may require laundromat.
Wash Settings
Warm, gentle cycle. Use gear specific soap (Nikwax Down Wash Direct). Rinse twice.
Drying
Tumble dry low heat with clean tennis balls. Finish by drying on high heat in 5 minute intervals to loft down. *Allow to cool between intervals to avoid damage to shell*
Important Notes
Warnings
Do not use fabric softeners. Do not bleach. Do not iron. Do not dry clean.
Repairs and Warranty
Coverage
All Big Agnes gear is guaranteed against manufacturing or material defect. We do not warranty products damaged from normal wear and tear, alteration made by owner, misuse, accidents, or damages caused by uses other than intended. Damage due to misuse, normal wear and tear, or improper care may be repaired, at the discretion of Big Agnes, at a reasonable charge. Gear returned for repair must be clean and free of debris.

Shipping Policy

Components:

All component items (wheels, drivetrains, suspension, brakes, etc.) ship within 1–4 business days of purchase.

Bicycles:

Complete bikes typically ship within 2–3 weeks due to build, tuning, and inspection times. You will receive tracking information as soon as your order is ready to ship.

Riding Gear & Apparel:

Riding gear and apparel orders (helmets, jerseys, gloves, etc.) ship within 1–3 business days.

Returns & Exchanges:

If you received the wrong size or wish to exchange an item, it must be returned in original condition—unused, uninstalled, and with all packaging intact.

For full details, please see our Refund Policy before initiating a return.

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Prepared with intention.

Every product is carefully inspected and handled by our team before it ships. From fit and function to final details, we make sure each piece is ready for the outdoors ahead—so you can focus on the experience, not the gear.

Passion drives us

At SpokeX Bike Co., bikes aren't just our business — they’re our way of life. As a rider-owned and operated shop, every decision we make comes from firsthand experience on the trail, at the race, and on the open road. We know what it’s like to chase a new line, push through the pain cave, and celebrate the ride — because we live it every day.

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