Therm-a-Rest Trail Scout Large is a robust and highly durable sleeping mat developed for outdoor use in rough conditions. It is built to withstand hard wear from rocks, gravel, and demanding terrain, and is also well suited for trips where a dog comes along. The solid construction makes the mat ideal for long-term use and tough conditions, which is also why it is used by the US military.

Despite its high durability, the Trail Scout Large is both lightweight and compact, making it easy to bring on long trips and expeditions. The mat provides good insulation relative to its thickness and contributes to comfortable sleep on varied terrain. The clever WingLock™ valve allows quick inflation and efficient deflation, making it easy to handle both in camp and when packing up.

For the best possible sleeping comfort, it is recommended to inflate the mat almost fully, lie down, and then release a little air to reach the desired firmness.

The sleeping mat comes with both a pump sack and a stuff sack, so inflation and transport are quick and straightforward. The Trail Scout Large has an R-value of 3.1, a thickness of 2.5 cm, and measures 64 x 196 cm. Packed size is 33 x 18 cm, and the total weight is 860 grams.