The 10 Mask Ear Strap Hooks by Mask Ear Straps are designed to provide adjustable extension for masks, relieving ear pressure during extended wear. Made of black plastic, these unisex adult-sized hooks are one-size-fits-all and easy to attach to masks to ensure a comfortable fit. Perfect for individuals looking to extend the lifespan of their masks or alleviate discomfort while wearing them for extended periods of time. 10 boxes with 10 per box=100 total