Question

Why did the mountaineers used double layered plastic sheet inside the tent

Answer 1

Mountaineers use double layer tent because single wall tent has only a single water proof layer and a lot of condensation can occur on the inner side of layer due to poor ventilation. ... Vapours condense only on the inside of outer layer. The double layer may also provide some thermal insulation

Answer 2

Explanation:

Mountaineers use double layer tent because single wall tent has only a single water proof layer and a lot of condensation can occur on the inner side of layer due to poor ventilation. ... Vapours condense only on the inside of outer layer. The double layer may also provide some thermal insulation