Kamperbox UL250 Sleeping Bag

The Kamperbox UL250 is engineered for the discerning backpacker who demands performance without compromise. At just 480 grams, it sets a benchmark in ultralight sleeping bags, making it one of the most portable options available for hikers, climbers, and wild campers. The mummy-style cut is scientifically designed to reduce heat loss—its tapered shape minimises dead air space, while the snug fit around the shoulders and feet ensures warmth retention without restricting movement.

The 800+ fill power duck down, sourced from RDS-certified suppliers, delivers outstanding thermal efficiency. The 90/10 down-to-feather ratio strikes a balance between durability and warmth, offering superior insulation compared to lower-grade down or synthetic alternatives.

The outer shell is made from 380T 20D nylon, a lightweight yet resilient fabric that resists abrasion and provides a degree of water resistance—critical for damp UK weather. Combined with a soft 380T 15D nylon lining, the interior feels luxurious against the skin, enhancing comfort during long, cold nights. The fabric is breathable, helping to regulate moisture and prevent condensation build-up inside the bag.

The hood is generously sized and adjustable with a drawcord, allowing you to seal in warmth around the head and neck—a crucial area for heat retention. The bag is also designed with a minimalistic approach to zippers and seams, reducing cold spots and improving overall thermal efficiency.

While rated for temperatures down to 5°C (41°F), the UL250 performs best in mild to cool conditions. It’s perfect for spring, summer, and early autumn use—ideal for the UK’s three-season outdoor calendar.

• Type: Ultralight, Mummy-Style Sleeping Bag
• Total Weight: 480 grams (including stuff sack)
• Packed Size: 24 x 12 cm 
• Unfolded Dimensions: 210 cm (length) x 75 cm (width at foot)
• Maximum User Height: Up to 200 cm (6’6”)
• Fill Weight: 250 grams
• Fill Power: 800+
• Fill Material: 90% Duck Down, 10% Feather (90/10 ratio)
• Shell Fabric: 380T 20D Nylon, water-resistant
• Lining Fabric: 380T 15D Nylon, soft and breathable
• Hood: Adjustable, insulated hood with drawcord
• Temperature Rating: 5°C (41°F) – Comfort zone
• Season: Three-season (Spring, Summer, Early Autumn)