1. Material : The mask is made of TPU, steel mesh and nylon; The goggles is made of PC Lens; Weight: about 220g () ; // Size: 21.517.514.5cm. 2. Elastic headband : Fit for the head circumference about 5264cm; Elastic headband can be adjusted to fit your face; Great ventilation: Excellent breathable steel mesh design and full face protection ensure your outstanding performance in airsoft games. 3. 3 Interchangeable Lenses : Come with 3 lens in total (Gray, Clear Yellow) Lens can be replaced according to different environments; Sponge inside the goggles provides comfortable wearing; 2 Modes to wear: Head wearing mode with elastic headband and helmet wearing mode (with 2pcs helmet adaptors to attach helmet side rails). 4. Strong Impact Resistance : Passed the ANSI Z80.3 ball drop test // Impact resistance up to 310FPS at temperatures from 10 degrees celsius to 42 degrees celsius.