Fallout Vault Boy Men's Black Lounge Pants Lounge in style while wearing these fun and fashionable Fallout Vault Boy Men's Lounge Pants! Comfy 60% cotton, 40% polyester. Black lounge pants feature a graphic of Fallout's Vault Boy mascot with his arms crossed on left thigh. Elasticized waist with drawstring. Officially licensed. Men's sizes.