Two Sizes Available. The liner is 45 x 82.7 inches (115 x 210 cm) / 63 x 82.7 inches (160 x 210 cm), providing ample space for tall individuals to move and stretch their legs. It can be used as a travel sheet, lightweight sleeping bag, or travel sleeping sack due to its ergonomic design. The sleep bag liner features a 39-inch (100 cm) opening on one side for easy entry. It can be used alone as a sleeping bag to separate dirty items, as a liner inside a down sleeping bag, or as a hotel sleeping sack. Keeps you comfortable throughout the night. The sleeping bag liner is made of premium polyester with a silky texture, making it soft and comfortable against the skin. Unlike regular cotton fabric, it resists wrinkling. This advanced fabric resists pilling and fading, ensuring long-term use. Weighing only 1.26 lb (573 g), it is exceptionally lightweight and compact. Despite its generous size, the sleeping bag liner folds into a convenient 21 x 21 cm (8.3 x 8.3 inch) pocket when not in use, making it easy to carry and saving space in your backpack.