Stash your clothes inside the Eagle Creek Pack-It Compression Sac and reduce the volume of your clothes by up to 80%. Suddenly, the world of packing has changed forever. Rather than leaving your dirty laundry to contaminate the rest of your clean clothes this sac separates your clean from your gnarly. A clever design allows you to remove excess air via a one-way pressure system, which compresses bulky garments so you can fit all kinds of extra t-shirts in your luggage. Zowww-eee!