1. Material: High molecular polymer. 2. Suitable for GoPro HERO4 /3+ /3 /2 /1, and other sport cameras. 3. Functions: Insert at both sides of protective housing, protect camera lens from fog; Suitable for diving, climbing, surfing and aerial photographing; Reusable. 4. Packing Specifications: Pack of 12. 5. Small size, easy to carry.