United States Army issued hand pump insecticide duster of the type used by US troops to delouse concentration camp survivors after liberation in 1945. The standard issued material used by the US Army for louse control was 10% DDT powder. Louse powder was placed in the canister and released through the spray nozzle when the hand pump was depressed. The powder was blown between the underwear and the skin, down the neck of the shirt, up the sleeves and into the trousers in as many directions as possible.