It beats the crap out of vacuum seal bags
"I fell for the vacuum seal fad. Seal this, seal that, seal everything! Clothing isn’t food, it doesn’t need to be in a zero oxygen environment to be transported everywhere. The eagle creek pack-it is honestly the most idiot-proof bag one could ask for. Clean clothes go in one sleeve, dirty in another. Simple. Simple, and effective. I’ve now bought one as a gift for family. That’s about as big an endorsement as one can give. Happy travels everyone!"