SAVE SPACE WITH THE OUTDOOR RESEARCH AIRPURGE DRY COMPRESSION SACK. The Outdoor Research Airpurge Dry Compression Sack was made for all you backpacking or car camping endeavors. Saving space can save you a whole lot of trouble, so it's a good thing this sack has 4 compression straps to squeeze down your stuff. And with fully sealed seams and a roll-top closure, the water can never wreck your belongings. FEATURESSized to fit in backpacks for trekkingAir permeable paneling for easy compressionFully sealed seams and roll-top closure for watertight seal4 compression strapsDurable buckle closureExternal daisy chainWebbing handle on bottomTECH SPECS70D nylon TPU material