Outdoor Research AirPurge Dry Compression Sack

Moosejaw says:
The Outdoor Research Airpurge Dry Compression Sack is a waterproof bag for gear protection while backpacking. Clothing, sleeping bag, whatever needs shielding from rain or a stumble into a creek, this bag will handle it. Available in 5 different sizes and 2 different colors, it compresses the contents and saves space in your pack. Features of the Outdoor Research Airpurge Dry Compression Sack Durable Lightweight Fully Seam Taped Waterproof Roll-Top Closure with Lightweight TPU-Coated Webbing Air-Permeable Band Allows Evacuation of Air for More Complete Compression Four Compression Straps Durable Buckle Closure External Daisy Chain Webbing Handle on Bottom