Space Saver Bags Are Perfect For Bulky Items Like Sweaters & Towels. They Can Be Used For Travel Or At Home To Store Clothes, Pillows, Towels, Etc. Easy To Use No Vacuum Or Pump Needed. Simply Fill, Zip, And Roll Out The Air. Key Features: High-Quality Double Zippers And Clips Ensure A Secure Seal For Optimal Compression Every Time. Do Not Over-Pack Or Force Items Into The Bag If They Get Wet. Fold Clothes As Neatly And As Flat As Possible In Order To Minimize Wrinkling. Do Not Continually Fold The Zip Element - It Will Reduce Its Ability To Seal. This Also Applies When Storing Travel Vacuum Pack Bags When Empty.