This is a stuff sack made using Tyvek Silver. By utilizing the waterproof properties of Tyvek Silver, such as with Therm-a-Rest Z Lite SOL, your gear can be kept from getting wet. *Therm-a-Rest is shown for photography purposes and is included for reference only; this listing is for the stuff sack only. Size: Width 39cm, Height 61cm, Depth 7cm The Therm-a-Rest in the photo is 51cm wide, 13cm high, and 16cm deep. It is included for size reference only and is not included. Please note that there may be slight individual differences due to amateur measurements. The cord and cord stopper may vary in color and shape. The inside will have the Tyvek lettering. Although unused, there are wrinkles and creases due to the nature of Tyvek. This is not a manufacturer's product, but a handmade item. Please refrain from purchasing if you are looking for perfection. Please note that it will be shipped folded. ★Tyvek® Silver is a sheet made by vapor-depositing aluminum onto high-density polyethylene non-woven fabric Tyvek®, and further coating each fiber with an anti-oxidation resin to prevent aluminum degradation. Unlike other companies' products that simply sandwich a breathable aluminum layer between thin waterproof films, this is a robust building material with little deterioration in waterproofness even after long-term use. ★From the HP of Asahi-DuPont Flashspun Products Co., Ltd. Thank you for your consideration. Function: Lightweight