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Mountain Hardwear Rook 0F/-18C


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Mountain Hardwear's Rook™ Sleeping Bag is an all-rounder for any camper seeking versatility and performance.

With the highest quality 650-fill down, the Rook™ 0F/-18C Reg Sleeping Bag delivers consistent insulation with a baffled design preventing cold spots throughout the bag. A mummy cut design also contours the body, offering a natural sleeping alignment.

The lightweight opening provides easy entry and exit with a two-way zipper for ventilation while the draft collar also blocks the escape of warm air seeping from the inside of the bag.

Additional features include a down-filled face gasket to block drafts at the hood opening and a durable water repellent finish to resist moisture.


  • 650-fill down is lightweight, warm and compressible
  • Lightweight but durable #5 zipper with anti-snag for easy entry and exit
  • Standard mummy cut is efficient, warm and comfortable
  • Down-filled face gasket comfortably blocks drafts at the hood opening
  • Two-way zipper allows for easy ventilation
  • Durable water-repellent finish
  • Compression sack and mesh storage bag included
  • Draft collar blocks the escape of warm air from inside the bag


  • Insulation: 80% Down, 20% Feather

Suitable Temperature Range

Fahrenheit Celsius
Bag Comfort Degrees 13° -11°
Bag Limit Degrees -18°
Bag Extreme Degrees -37° -38°


  • Weight: 1450 g
  • Bag Shape: Standard Mummy
  • Bag Loft: 18 cm
  • Bag Fill Weight: 940g
  • Bag Stuffed Size: 22 cm x 42 cm
  • Inside Length Regular: 218cm
  • Inside Length Long: 234cm
  • Hip Girth Regular: 140cm
  • Hip Girth Long: 148cm
  • Shoulder Girth Regular: 152cm
  • Shoulder Girth Long: 157cm