1. Inspection of the suction pump: Pump tip tightly to his face, and then exhaust, if you feel suction, it means that the pump is good.

2. If there is bulging phenomenon in the empty bag, besides the tight sealing, on the one hand, the quilt and other things in the bag will deflate and reduce the vacuum; on the other hand, from the physical point of view, the dense material also has a gap, because of the negative pressure, with the passage of time, the air molecules will be "squeezed" into the bag, and the vacuum effect will gradually decrease.

3. Leather and down products can be put into this product, but not completely compressed.

4. Clothes should be removed from their packaging paper or bags before they are put into collection bags. Otherwise, the compression effect will be affected.

5. Clothes placed in collection bags should be fully dried. Do not need to use insect repellents, preservatives, etc., otherwise will cause the purchased goods discoloration, deterioration, etc.

6. If the bag has a crack or a broken small opening, it can be glued on both sides with ordinary wide-edged transparent tape, and then it can be glued tightly.

7. Prevent excessive moisture in the bag. If the temperature is relatively low somewhere, it will condense into droplets.