These polyester sheets are extremely breathable and feel great against the skin. Place these sheets inside your sleeping bag to bring a little extra comfort for a good night&';s rest. Machine washable and includes a stuff sack. SPECS Weight:- 7.1 oz (220 g) Material:- 75-denier polyester taffeta Compressed size:- 3.5x6.1 in (9x15.5 cm) Other:- Max. Size 72.4 x 30.3 in / 184 x 77 cm