You know you'll need a puffy or a fleece on this campout, but it's always a hassle to pack bulkier clothing in your pack when you're already pressed for space. The Eagle Creek Pack-It M/M Compression Sac Set is here to help. Able to remove excess air from bulkier layers to reduce packing volume by up to 80%, these medium sized sacs are the perfect way to bring along those warm clothes that you might not want to pack but know that you should. They're nylon reinforced for extra durability on rugged trips, and feature a zippered closure with a one-way pressure-releasing valve on the other side.