1. Material: Silicone + PVC 2. Color: Blue, Black, Red, Green, Gray, 3. Size: S/M: (I.D) 17*13 cm, (O.D)23*19 cm; L/XL: (I.D) 19*13 cm, (O.D) 23*19 cm 4. Suitable: for adults and children 5. Applicable: for diving, swimming, snorkeling and other underwater activities. Tips: 1. Put on the diving mask and place your head in the water to ensure that no water enters the mask. 2. Breathing naturally when the dry top is above the water. 3. Put your finger in the gap between the mask and the chin, then push the mask up to the face and remove the mask. Packing list: Diving mask *1 A pair of earplug Nut *1 Gasket *1 English manual *1 Adjustable elastic fabric headband, easy to wear and suitable for all kinds of head shape. Easier than ever to breathe comfortably through your mouth or nose while you are snorkeling.