Lining material: imported medical liquid silicone, non-toxic, environmental protection.
Double flow fan design principle, effective anti fog; without breathing tube to breathe;
A complimentary pair of waterproof earplugs
With packing weight: 578 g
Net weight: 554g
Size: S/M size: 23 * 17 * 13 cm inner diameter, outside diameter 19 cm (children edition)
L/XL size: 19 * 13 cm inner diameter, outside diameter 23 * 19 cm (adult version)