Some people say "tree hugger" like it's a bad thing, but you won't hear that around here! We love trees and we certainly love Groot! This heathered forest green boyfriend fit tee isn't just the color green, it's also green - - RPET stands for recycled polyethylene terephthalate, or recycled PET. PET is a strong, durable and recyclable material that is used for soda bottles, water bottles and food jars. With its adorable Groot graphic, it's the perfect everyday tee, because every day is Earth Day.