Sleeping bags work best when they are clean and uncompressed. While not in use, the storage bag protects your bag and gives it space to loft, increasing the lifetime of the sleeping bag.Uncompressed Dimensions: 16 x 8.5 in / 39.4 x 21.6 cm Compressed Dimensions: 12 x 8.5 in / 29 x 21.6 cm Weight: 2.7 oz / 76 gMaterial: Sil-Nylon