Women's Anthracite 20° Sleeping Bag: Three-Season Fit
By Sleeping Bags, Tents, Pads & Outdoor Gear | Published: 2026-10-20
Category: Product Reviews
Our Women's Anthracite 20° sleeping bag review covers fit, warmth, and features for side sleepers. See if this three-season bag is right for you.
Quick answer
The Women's Anthracite 20° sleeping bag is a solid three-season choice for women who sleep on their side, offering body-mapped insulation and a tapered fit that balances warmth with packability.
Why fit matters for women
Sleeping bags designed for women typically have extra insulation in the footbox and torso, plus a narrower shoulder width and a shorter overall length. The Anthracite 20° follows this pattern, but its tapered cut can feel restrictive if you move a lot at night.
Warmth for three-season use
With a 20°F rating, this bag is warm enough for spring and fall trips, but may be too warm for hot summer nights. The synthetic insulation retains heat even when damp, a practical advantage in wet conditions.
Frequently asked questions
- Is the Anthracite 20° suitable for side sleepers?
- Yes. The bag includes extra insulation and padding at the hips and shoulders, reducing pressure points common for side sleepers. The tapered cut still allows some movement, but if you toss a lot, consider a rectangular bag.
- What temperatures can this bag handle?
- Rated to 20°F, it's ideal for cool spring and fall nights. In summer, you may overheat; unzipping or using it as a quilt can help. For winter camping below freezing, look at a 0° or lower rated bag. Pair with a sleeping pad rated for similar temperatures to maintain warmth.
- How does the fit compare to unisex bags?
- The Anthracite 20° has a shorter length and narrower shoulders than unisex models, reducing dead air space that your body has to heat. If you're taller than 5'8", check the size chart carefully.
- Can I use this bag for backpacking?
- Yes. The synthetic insulation compresses moderately well, and the bag weighs around 2.5 lbs. It's a practical choice for three-season backpacking where weight matters but not as critical as ultralight down bags.
Product facts
- Sidewinder 0˚: Specifically designed for the over 60% of people who sleep on their sides, with body mapped insulation to optimize warmth and provide cushioning at hips and shoulders. Side sleepers often wake up with cold shoulders or hips; this bag addresses those pressure points directly.
Sidewinder 0˚
