Man of Many Vices T-shirt. Tool t shirt is the perfect tshirt dad gift ideas from son daughter on birthday under 20. Duct tape tools DIY shirts for your geek nerd tech makes funny cheap Christmas Valentines Fathers Day gifts too. Printed on Heather Grey 90/10 cotton/poly T-shirt. (#1A986) Questions about sizes?. A ComputerGear exclusive. Item in stock unless noted above.