The Trek down sleeping bag brings the comfort of a tapered-rectangular mummy shape and the versatility of a dual-zip ventilation system to wherever your travels may take you. The full-length side zipper and secondary foot box zipper allow you to increase ventilation or open the Trek completely flat like a comforter, and the quality down will keep you warm and snug on chilly nights. The broader mummy cut gives you room to move inside the bag, regardless of your sleeping position. A Regular Wide model is available for those who really appreciate the extra wiggle room. Light and compact, the Trek might just become your favorite trekking / backpacking / travel / camping / down sleeping bag. Features: ULTRA-DRY Down 650+ Loft 85 % Down Cluster Premium Duck Down certified Responsible Down Standard (RDS) Full-length YKK® #5 main side zip and foot box zip provide superior ventilation and allow the bag to be used as a comforter Shaped hood and oversized zipper draft tubes (Trek 10°F also has a draft collar, fits snugly around shoulders) to seal in warmth and keep cold out Internal pocket for phone / GPS / valuables Includes lightweight Ultra-Sil compression bag and storage cell Form a snug double sleeping bag by zipping to any Altitude, Journey or Venture sleeping bag Technologies: 650+ LOFT ULTRA-DRY DOWN RESPONSIBLE DOWN STANDARD (RDS) ZIP COUPLING Technical specifications: BEST USE: All outdoor activities COMES WITH: Ultra-Sil Compression Sack & Storage Cube INSULATION: Ultra-Dry Down 650+ Loft SHAPE: Relaxed Mummy SHELL FABRIC: 30D Nylon Shell ZIP OPTIONS: Full length left side and foot box zipper. Unzip fully to use as quilt or comforter. Age Group: AdultOriginal Colour by Producer: Bright Blue/DenimSize: LongVariant: TkIColour: BlueComfort Temperature: 5°CMade in: ChinaDiameter: 162 cmDiameter: 157 cmDiameter: 108 cmExtreme Temperature: -16°CFace Fabric: NylonGender: UnisexInner Length: 198 cmInsulation: DownLimit Temperature: -1°CMaterial: NylonWeight: 850 gZip: Left