What Our Gearhead® Experts Are Saying: "I used the Anthracite 20 on a shoulder-season backpacking trip, and it surprised me with how light and warm it was for a synthetic bag. The FireLine Pro insulation feels lofty and packs down small, plus I never worried about damp conditions. The zipper draft tube and contoured hood really lock in warmth when temps dip below freezing."When we’re counting ounces and chasing elevation, the Big Agnes Anthracite 20 FireLine Pro Recycled Sleeping Bag brings dependable warmth and comfort to our camp setup. Big Agnes crafted this mummy-style bag to balance performance and sustainability, using recycled materials throughout its construction without sacrificing weight or durability. The 20D ripstop shell holds strong against rough tent floors and packs, while a PFC-free DWR finish repels condensation and light moisture. Inside, FireLine Pro Recycled insulation delivers lofty, down-like warmth that stays cozy even when humidity rises or dew settles in. A silky pongee liner adds soft comfort against the skin, while the contoured hood and draft collar seal in heat through cold alpine nights. With its easy one-hand hood adjustment, smooth two-way zipper, and included stuff sack, this bag is ready for backpacking weekends, car-camping escapes, and everything in between.