Pic: The Edelrid Mantle Crash Pad
Some more technical info: It is 10 cm thick using 2 different foams to offer optimal cushioning and absorption. The outer material is strong ballistic nylon which provides a robust and water-repellent shell (useful for wet Rocklands and Topside days). As I said above the two halves can be zipped together either on the long side (120 x 115 cm), or on the end (230 x 60 cm). The Mantle has sturdy shoulder straps and indestructible aluminum buckles.
Pic: Me putting the Edelrid Sit Start launch pad to use