Description: Sleeping bag liner is made of 20D Nylon with a durable waterproof coating premium material, an extremely high quality, durable and compact underquilt 90% white duck down filling material inside, 300g, washable, 650+ bulkiness, breathable, ultralight, foldable, portable, better warm keeping, under-body insulation and padding Can be used as sleeping bag under quilt when in cold weather in winter or autumn, or use alone when in summer or spring for warm weather like 18-30 degrees, better to have moisture proof ground sheet in tent Full length under quilt is well cut and fit for most typical hammock or sleeping bag, very fast and simple setup and take down, can be folded into small size, with compression stuff sack for convenient storage and carry A nice underquilt suitable for camping, hiking, travel, backpacking, fishing, backyard, picnic, beach, cycling, climbing, and other outdoor activites Specification: Material: 20D Nylon Fill Material: 90% White Duck Down, 300g Unfolded Size (L x W): Approx. 175x75cm / 68.9x29.5 inch Compression Size (L x W): Approx. 18x13cm / 7.1x5.1 inch Package Includes: 1 Piece Underquilt Note: Please allow slight size deviation and color difference. Please NOTE that our product is NOT the typical sleeping bag.