1. Material: High molecular polymer. 2. Compatible Camera Models:GoPro HERO4 /3+ /3 /2 /1, Xiaomi Yi, SJCAM SJ6000 / SJ5000 / SJ4000 Sport Camera. 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.