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The Kelty Cosmic Synthetic Fill 20 Degree Sleeping Bag is a lightweight, durable mummy-style bag designed for 3-season backpacking. Featuring Cirroloft synthetic insulation, it offers reliable warmth down to 20°F while maintaining loft in damp conditions. Its integrated compression sack and compact stuff size make it ideal for minimalist packers, and the spacious footbox fits sleepers up to 6 feet tall comfortably. Built with Kelty’s renowned craftsmanship, this bag balances performance, comfort, and packability for serious outdoor enthusiasts.




| Age range | Adult |
| Color | Dark Blue |
| Size | Long |
| Style | Long (2025) |
| Insulation material | Synthetic |
| Shape | Mummy |
| Material type | Nylon |
| Maximum height recommendation | 6 Feet |
| Outer material | Nylon |
| Seasons | 3 Seasons |
| Batteries included? | No |
| Brand | Kelty |
| Fill material | Synthetic |
| Department | Unisex |
| Manufacturer | Kelty |
| Item model number | Kelty |
| Product Dimensions | 182.88 x 71.12 x 7.62 cm; 1.52 kg |
| ASIN | B0DPNKCY4F |
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