Our Product Usage Vacuum Bag Usage Open the bag and place your items inside. Slide the zipper back and forth 2-3 times to ensure proper sealing. Remove the cap and use the pump to extract the excess air from the bag through the valve. Tighten the lid then store the compressed bag in a dry location. Roll Bag Usage Open the bag and place your items inside. Tighten the zipper to ensure the bag is sealed very well. Roll up the bag, let the excess air be squeezed out from the end of the bag.