No vacuum needed, just press your hand to deflate and compress your comforter. New double zipper for smooth sliding.
It is very easy with a check valve that prevents air from escaping with light force. Each compression bag comes with a fixed slider, so you wont lose the slider
Size: 35.4 x 43.3 inches (90 x 110 cm); Material: Compression Bag: Nylon, Polyethylene; Slider: Polypropylene; Country of Origin: Japan; Manufacturer: Showpla Co., Ltd. [Estimated Usage Per Compression Bag] Single Comforter 4 Folds: 1 piece, Zabuton: 3 - 5 pieces, Blanket Folded 3 - 4 pieces.