Our hair growth rollers contain plastic, silicone, nylon. It can promote thinning hair growth, activate the stem cells that produce new hair, stimulate the regeneration of dead hair follicles, hair growth is rapid, and the average new hair thickness increases. Its application method is very simple: start from the root, activate the stem cells that produce new hair, and stimulate the regeneration of dead hair follicles; hair grows 80% faster, and the average new hair is 240 thicker; new hair appears, about 67% thick; Stable thick new hair, healthy thick hair. Promotes hair growth, strong hair root growth nourishes the scalp, soothes and improves the scalp for healthy thick hair.