1. Ideal for dust, bacteria, smog, pollution, ashes, pollen, crafts, gardening, travel, anonymity. 2. They are made of non-woven materials and have good skin tolerance and wearing comfort. 3. Lightweight, with a comfortable and adjustable elastic band 4. Elastic earhook, no ear pressure. £5 is great for carpentry, house cleaning and general maintenance. Size: 18*9 cm color: blue Material: Non-woven notes: 1. Due to the differences between different monitors, the picture may not reflect the actual color of the project. 2. Compare the detailed size with your size, due to manual measurement, please allow a slight difference.