KSB 20 Down Sleeping Bag

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  • Lofty, warm and light, the KSB 20˚ down sleeping bag is designed for three-season backpacking.
  • The 650 fill power down delivers exceptional warmth for its weight, is easily packed and provides years of use.
  • A draft collar, over-stuffed foot box, insulated mummy hood and flexible baffles at the body’s core all work together to minimize heat loss for greater thermal efficiency.
  • High tenacity fabrics are tough, light and comfortable.
  • The expanded chest area and flexible baffles provide room to move, and a stash pocket keeps small items right at hand.

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Product Details


  • Weight: 2.75 lbs / 1.25 kg
  • Temperature Rating: 20˚F / -7˚C
  • Dimensions: 84.5" x 31.5" x 21.7" / 214.6 cm x 80 cm x 55.1 cm
  • Pack Size: 13" x 8.5" / 33 cm x 21.6 cm
  • Fill Power: 650
  • Insulation Type: White Duck Down
  • Warranty: Limited Lifetime


  • Draft Collar: To maintain thermal comfort throughout the night, an insulated tube wraps around your shoulders to prevent heat from escaping as you sleep.
  • Stash Pocket: A small pocket is integrated into the draft collar – perfect for stashing a headlamp, wallet, phone or midnight snacks.
  • Soft Fabric: The soft, hydrophobic, 20D nylon lining is silk-sheet comfortable and won’t absorb moisture.
  • Temp Rating: Tested and rated at 20˚ F for three season comfort.
  • Fill: Warm, lofty 650 fill-power white duck down is lofty, warm and breathable
  • Half-Moon Foot Box: The three-dimensional foot box utilizes a half-moon shape to help retain warmth, provide added room for greater comfort, and to allow the use of one of our sleeping pads inside the bag.
  • Flex Baffles: Flexible baffles provide freedom of movement and keep the insulation close to your body for more efficient thermal performance and exceptional comfort.
  • Expanded Chest Area: Thoughtful patterning expands the girth at the chest for added comfort and the freedom to move throughout the night without impacting thermal performance.
  • Mummy Hood: Insulated and comfortable, the mummy wraps the head to maintain essential warmth.


  • Water Resistant: Outer fabric has a durable water repellant (DWR) treatment to protect the insulation from moisture that can impede thermal performance and add weight.
  • Durable Fabric: Light and tough 20D rip-stop nylon has a high strength-to-weight ratio to help resist tears without adding unnecessary ounces.
  • ¾” Full-Length Zipper with Guard: Burly, but not bulky, the 3/4“ full length zipper has two-way sliders so it can be unzipped from top or bottom for ventilation. A full length zipper guard helps seal out drafts.
  • Pack Size: Two stuff sacks included for compact transport and larger storage.


  • Lightweight Materials: The 20D rip-stop nylon is light and compressible.
  • 650 fill power white duck down fill provides exceptional warmth for its weight.