200pcs Black Soft Plastic Round Elastic Mask Adjustment Buckle Adult Children Elastic Adjustment Accessories

Step for Usage 1. Place the elastic band in the middle of the U-shaped clip. 2. Use the U-shaped clip to pass through the buckle (enter from the big hole) 3. Grab the Cord Locks and slide down, sliding onto the elastic band (see Figure 5 for more details) 4. Adjust to a comfortable position. Provide the best service: In order to bring you a better customer experience, we promise to fully refund the unsatisfied customers. If you have any questions, please contact us at any time, we will provide you with 7*24 hours customer service. Package? 200 x Cord locks 1 x U-clamps (Threading tool)