The U.S. Army has developed shell proof wallpaper. The fabric is applied, like wallpaper, on the inside of troop work and living quarters, in areas where the enemy fires rockets and mortar shells into the area. Thus when fast moving fragments or debris hit the structure, the new material, called X-Flex, stretches and halts, or slows down, the fast moving object. This makes it much less likely that anyone inside the structure will be killed.
Over the last five years, the U.S. Army has gone to great lengths to protect troops in camps. Tight perimeter security has kept suicide bombers, and terrorists in general, out of the camps. But there are still rocket and mortar attacks. These usually cause few casualties, but those that do occur are the result of shell fragments or debris coming through the walls.
X-Flex has done well in tests, but has not been used in a combat zone yet.