With a relaxed mummy shape and a regular fit, the REI Co-op Lumen 20 sleeping bag is a 3-season bag full of synthetic insulation that offers excellent compressibility, warmth and value. 

Technical Specs

Temperature Rating (F): 20°

Best Use: Backpacking

Tested Lower Limit: 20 degrees (F)

Comfort: 31 degrees (F)

Shell is made of Riptston Nylon

Fill Content: Polyester fibers

Zipper Location: Left, Regular

Lining: Nylon

Shape: Mummy

Features

• With a European Norm (EN) lower-limit rating of 20°F, this bag is suitable for 3-season use
• Synthetic polyester insulation is durable and highly compressible; the fill also retains some insulating ability if it gets wet
• Shingle construction with overlapping layers distributes insulation evenly and prevents cold spots
• Equally distributed insulation accommodates the multiposition sleeper; mummy shape is thermally efficient, yet roomy enough for sleeping comfort
• Durable ripstop nylon shell is water- and abrasion-resistant; nylon taffeta lining is soft and resists tears
• Relaxed fit through the shoulders and hips gives you room to move
• Contoured hood, insulated face muffler, roomy footbox and full-length zipper draft tube work together to keep heat in and cold out
• Bag has a stash pocket under the collar
• Pad loops provide attachment points to keep your sleeping bag and pad together (sleeping pad not included)
• Anti-snag zipper slider delivers swift and smooth zipping
• Differentiated drawcords (1 round, 1 flat) allow quick hood and neck adjustments in the dark
• Nylon stuff sack and mesh/nylon storage bag included

REI Item No. 110921