The material of this bracelet is rubber, a flexible material that when subjected to a heat source expands and then returns back to its initial state. To make the bracelet larger and make it easier to pass it through the hand, you must warm it by immersing it in hot water for a few minutes or you can apply heat gently to the opposite part of the hands and stretch. This way the bracelet gets bigger and it is easier to put on. Once worn, the bracelet returns to its original size and fits snugly on the wrist. Special care must be taken with the upper part of the bracelet where the hands meet, as this part is weaker and if a strong pull is applied it could break. Always handle the bracelet by the widest part, the opposite one to the hands.