Boys will appreciate Sierra Designs cold-weather workhorse, the Big Dog. In 2009, Backpacker gave the Big Dog 'Best Kids' Bag,' rated to 20 degrees and filled with HeatSync insulation. Don't let the cold prevent your next outdoor adventure, embrace it! Offset Layer Construction. Ergonomic Hood and Foot Box. Microfleece Lined Foot Box. Tuck Stitch. Pillow Pocket. Chest Pocket. Integrated Storage Sack. Trail Weight: 2 lbs 12 oz. Fits Up To: 5'. Zipper Side: Left. Fill Weight: 21 oz. Stuff Size: 7'' x 17''. 75D Polyester Shell material.