[HAND PRESS, No Air Pump Required] Essential for travel storage! vacuum storage bag is not necessary to bring a suction pump during the trip, just manually press the suction to achieve the perfect compression effect. The compression speed is fast, without the pressure. suction noise influence. (If you want to use a vacuum cleaner or suction pump can also achieve compression) [Large Capacity, 4 Packs Is Enough] 4 three-dimensional bag = 16 traditional flat bags . 2 Packs(50x70x30cm) medium vacuum storage bag can be used for luggage storage, clothes storage, very suitable for travel, clothes can be taken on the plane after compression. 2 Packs (80x100x38cm) giant vacuum storage bag can store lots of clothes and quilts. Also suitable for use when traveling. [Compression Speed, 3X Than Traditional Compression Bag] bag compression adopts the latest patented exhaust valve, which makes the exhaust faster. The pressure and exhaust speed is 3 times that of the traditional valve, which saves more labor. In addition: the latest vacuum storage bag air valve does not require the design of a lid and a fixed sealing clip to avoid loss problems. [80% space saving] The space is compressed to 80%, vacuum storage bags can be filled vertically, and the bottom can be upright, which is convenient for storing bags. vertical cabinet space is no longer utilized. The compression won't damage the goods you store inside, a perfect storage solution for loose items like quilts, pillows, quilts, sheets, towels, blankets, stuffed animals, down jackets, etc. [Anti-tear and reuse process] Side anti-tear technology of the vacuum storage bag to strengthen the quality of the bag and avoid the risk of tearing. More sealed against dust, moisture, mold, insects and odors. After use, store it and can be used again.You must tighten the inflation valve after inhalation and compression to avoid air leaks!