It needs to be replaced few months. for p10 headgear. Super comfortable headwear: Made of high-quality elastic fabric to comfort and softness. Comfortable and to your body, help you have an uninterrupted all night. Super elastic:-Super elastic fabric headgear designed to fit your head. The split straps can be separated to be looser, or squeezed to be tighter, with the gray side facing outwards and the blue side facing inward. There is no rough and is comfortable to wear. Durable: Our headband is very soft and elastic, with strong tensile strength, made of high-quality nylon to long-term , and enough materials to additional durability; Easy to care:-Our shoulder straps are easy to wash with mild soap, rinse , and allow to dry weekly. Do not wash the headgear with a washing machine or dishwasher. The headgear should be replaced 3-6 months to it fits and seals time you it. Material:nylon colour:Blue Package Contents: 3 x headbands 6 x buckles Only the above package content, other products are not included. Note: Light and different displays may the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.