light weight bendable plastic not the cheap flimsy type that breaks bargin at this price [SEP] light weight bendable plastic not the cheap flimsy type that breaks i purchased the to hold my hair up off of my neck to stay cool during the summer months perfect for my hair if you have really thick hair i do not know how they will work for you because the teeth are pretty short but overall i am very happy with these clamps if i had purchased these in a local store they would have been about dollars bargin at this price