The Sea to Summit Basecamp Bc I Sleeping Bag is a down sleeping bag with plenty of wiggle room. The rectangular cut offers space while the ULTRA-DRY Down 750+ fill provides warmth down to 30 degree nights. At 2lbs, 5oz (regular length) it packs down into a 7.8L included stuff sack. Ideal for base camps, so you can hike spokes or enjoy tackling the mountain peak separately from the rest of your adventure. Features of the Sea to Summit Basecamp BC I Sleeping Bag ULTRA- DRY Down 750+ Loft 90/10 Down Cluster Premium RDS-certified Duck Down Spacious rectangular shape Two position sleeping mat attachment system Differential cut shell Zip draft tube with anti-snag Neck draft tube Cushioned internal hood draw-cord 2-way YKK #5 zip on each side of the bag and a third YKK #5 zip in the footbox for ventilation, removing the top of the bag for use as a quilt, or for joining two Basecamps together Includes lightweight Ultra-Sil compression bag, combined storage cell / laundry bag