Klymit · Sleeping Gear

KSB 0F/-18C Sleeping Bag

Name: KSB 0F/-18C Sleeping Bag
Brand: Klymit
Price: 334.99 CAD
Availability: InStock

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About this product

The Klymit KSB 0F/-18C is a mummy-style sleeping bag rated to 0°F (-18°C), designed for cold-weather camping where reliable warmth through freezing nights is essential. Its hybrid insulation system pairs 80/20 grey duck down on top (650 fill power) with synthetic fill on the bottom, balancing warmth-to-weight performance with moisture resistance where it matters most. The large size measures 82 by 30 inches (208 by 76 cm) with a 58-inch shoulder girth, and the packed weight comes in at 1.8 kg (3.9 lb), compressing into a 16 by 9.5 by 9.5 inch stuff sack. Flexible stretch baffles keep insulation close to the body during movement, while Length Locks allow height adjustment for a snug foot-box fit. A mummy hood with draft collar and drawcord seals in warmth, and an anti-snag two-way YKK zipper offers ventilation control from either end. The 20D Nylon 400T shell includes a WRC6 water-resistant coating, and an interior stash pocket adds convenience. Backed by a 2-year warranty.

Category: Sleeping Gear
Brand: Klymit
Material: Shell20D Nylon 400T (WRC6)
Color: Colour: Orange - Grey
Size: • Dimensions: 82 × 30 in / 208 × 76 cm
Weight: 3.9 lb / 1.8 kg
Warranty: 2 Years
Dimensions: 82 × 30 in / 208 × 76 cm
Fill Power: 650 FP
Shell Material: 20D Nylon 400T (WRC6)
Shoulder Girth: 58 in

What people are saying

Reviewers consistently praise the Klymit KSB 0F for its exceptional warmth, frequently noting it performs reliably in temperatures well below freezing, including single-digit conditions. The stretch baffles and roomy interior are standout features, especially appreciated by restless sleepers and larger individuals, with many recommending the oversized version for a better fit. The adjustable length locks and built-out foot box also earn positive mentions. The most common criticism is the bag's bulk and weight when packed, making it a poor fit for ultralight backpacking and better suited to car camping or base camp use. Some users also report zipper issues and durability concerns with the shell fabric after limited use.