Dinosaurs Boy T-Shirts & Pants. Made of ultra-soft and stretchy bamboo/cotton. Bamboo is hypoallergenic, offers excellent ventilation and heat regulation, is sweat resistant and eco-friendly. Machine Wash Warm, Tumble Dry Low. 67% Bamboo, 28% Cotton, 5% Spandex. Optional headwear completes the outfit. Pants have elasticized wait for easy on and off.