Voted Best Kids Bag- Backpacker Magazines Gear of the Year Awards 2009Boys will appreciate Sierra Designs cold-weather workhorse, the Big Dog. Rated to 20 degrees and filled with HeatSync insulation, the Big Dog packs warmth and comfort into a cool-looking bag. An attached stuff sack wont get lost, and a Sleep E-Z Pillow included stows in its own pillow pocket. The ergonomic hood and draft tube retain heat and a tricot-lined foot box provides additional insulation for feet. No sweat on losing your stuff sack with the Attached Storage Bag on the Big Dog.