These elastic bands for hat feature removable metal barbs, providing flexible length adjustment for various face sizes. The elastic strap for mask is suitable for diy elastic string projects, enhancing the security and comfort of party hats, mask hanging rope, and costume accessories, making them an essential choice for crafts elastic rope enthusiasts. Features -Color:Black -Material:Iron, nylon, rubber -Size:30.00X0.15X0.15cm/11.79X0.06X0.06in -Effortless adjustment: the elastic hat band integrates metal barbs, making elastic string for masks and hats simple to resize for children or adults -Strong elastic resilience: crafted as elastic cord for hat, this product maintains elasticity and shape even after repeated stretching, supporting mask making elastic ropes -Multifunctional use: the elastic bands for party masks serve as elastic hat fasteners, hat rope, or elastic chin strap cord, nice for events, diy crafts, and daily accessories -Enhanced security: elastic strap for mask features fixed iron clip ends, preventing the elastic string for party hats from coming loose and providing extra safety -Creative diy solution: elastic cord for diy suits professional mask makers, working as elastic band for party hats or removable hat chin cord for projects Package list: 150 x elastic cords