Frelaxy Compression Stuff Sack is an incredibly simple and practical solution to space-saving, they will give you more space to pack what you need and give you an unprecedented portable experience.?Made of high-quality 210T Tear Resistant Nylon Material, Effectively balances LIGHTWEIGHT (only 80g,90g,120g,140g, Size: S~XL) and DURABILITY, features a water-resistant coating to keep your valuables dry. ?Easy Operation: Just put your items inside, close the lid, and adjust the straps. you'll be amazed at just how much you can squeeze into the sack and just how much space you can save.?Keep your gear organized: Available in 4 Sizes (8L/ 15L/ 25L/ 35L) for all your needs, ideal for internal pack organization, packing up whatever you feel like belongs in a bag that can be compressed, eg clothes, blankets, sleeping bags, pillows, hats, gloves.Professional Grade Features: 1. Comes with 4 adjustable straps for even compression (2 Strong compression straps & 2 Quick-Release Buckle Straps) 2. Reflective trim on the straps, it helps you spot & retrieves your stuff sack in the dark. 3. Pull handle on the bottom for easy carry. Size Chart: S: 8L (7x13 Inches) M: 15L (8x16 Inches) L: 25L (10x19 Inches) XL: 35L (11x20 Inches) (Please check more detail in the size chart in the 4th picture.) FREE Exchange size if not match without RETURNING & WORRY-FREE 12-MONTH WARRANTY & LIFETIME CUSTOMER SERVICE