Tri-Lateral construction - an independently 'floating' layer of insulation for wrap around warmth and fewer cold spots. 4T synthetic insulation - utilises a channel structure to trap warm air, resulting in an unrivalled warmth to weight ratio. 20D Polair Active fabric - durable, soft and compressible shell. Thermal-Reverb technology - aluminised layer reflects body heat back for increased efficiency. Thermal Embrace System - semi elasticated thread inserts cause the sleeping bag to sit closer to the body for extra warmth retention. Insulated adjustable shoulder baffle. 3D hood with cord closure. Arrow footbox. Insulated zip baffle. Two way auto-lock zip system - with zip guard for ease of use. Internal pocket. Omega shaping - zips and seams positioned in the lower section of the sleeping bag for added comfort. 4-strap compression stuff sack. Performance: 3-4 season. Comfort rating: -1 degrees. Extreme usage: -24 degrees. Pack size: 27 x 24cm. Weight: 1.35kg.