Both the bottom and four sides are made of thick 3 layer embossing Non-woven fabric, breathable, light weight, high quality, and sturdy, long service life. This soft storage bag size is 39 x 20 x 6inch(100*50*15cm), which fits comfortably under a bed or up on a closet, perfect for comforters, blankets, clothes, quilts, pillows, sweaters and so on. 2 pcs set will provide more storage space for you, meet your various storage needs. The thick top transparent window let you find what inside Quickly, save more time. 4 handles on 3 sides for Easier carrying and pulling. Double 5# zipper is strong and solid. They are Foldable when not in use, Stackable when filled with comforters, blankets, etc. Save space, perfect for small spaces in home, college dorm, bedroom, basement, attic, or more. TIPS: This is a soft bag without any frame structure.