Reptiles are Ectotherms. An Ectotherm is any animal whose regulation of body temperature depends on exchanging heat with external sources. Like a lizard basking on a hot rock. You can discuss this with your friends as they compliment you on your new favorite shirt.
The Ectotherm T-Shirt. Available in Black, Maroon, Orange, and Teal. Sizes S-XXL.
60% Combed Ring-Spun Cotton, 40% Polyester /32 singles, 145 grams/4.3oz