100% and good quality. It has good elasticity and can be used repeatedly. Overall good workmanship,quality assurance,the use of a unique absorbent elastic material fiber manufacturing process,environmentally friendly materials. It is a universal headband that can be for each type of nose mask. The headband is a versatile headband of various nose pieces, the headband is made of three layers of heat sealing material, durable and durable waterproof non-toxic. Instructions: When wearing the headband of the four non-piercing the buckle into the mask of the two perforated and two hooks will be worn on the head mask to adjust the hook on the elastic , that is worn to complete, the can rest that use. Specification: Name:Ventilator mask headband Colour: black Material: nylon fiber Size: About 75x13 cm Package Contents: 1 x Ventilator Headband Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.