Remove excess air from bulky garments using Eagle Creeks Pack-It Compression Sacs and save up to 80% of your packing volume. These durable nylon-reinforced compression bags are handy for saving space or for getting your dirty laundry home without mixing it with the rest of your bag. So next time you want to bring an extra jacket, you can! Just put it inside a compressor sac, zip it closed and roll it. Youll hear the excess air releasing through the one-way patented valves. We aim to please!