This pair of nylon laundry bags by #WOWLIVE are perfect for travel. They fold flat and roll so they will take practically no room in your bag. Great for keeping whites and dark dirty clothes separate. The locking drawstring means your dirty clothes won't spill out onto your clean clothes during travel.
For $10.98 you get both bags. One in gray and the other in teal. And because they're made of a good quality nylon damp clothes won't get your other clothes damp. Worth the price.