The Sea to Summit Traveller TRI Sleeping Bag is an ultralight summer bag made for the ounce-counters who like to backpack, bikepack, or thru-hike. The minimalist design simply Features a two way zipper and drawcord closures at the top and bottom. Close the footbox when it's chilly, cocoon the bag around your hammock, or open it all the way up and tuck it in like a comforter. Do what you want really. The lofty goose down compresses to the size of a small nerf football, so it's easy to bring along for most any warm weather adventure. Features of the Sea to Summit Traveller TRI Sleeping Bag 750+ loft ULTRA-DRY Down 90/10 Down Cluster RDS-certified Premium Duck Down Cut with a slight taper Collar and foot drawcords Opens to a blanket YKK 3 side zipper can be used left or right hand Reversible shell Can zip together with another Traveller Season ratings: Indoor, Summer, Spring/Autumn Includes lightweight Ultra-Sil compression bag, storage cell and laundry bag