Yosoo Children Kids Swimming Diving Silicone Fins +Snorkel Scuba Eyeglasses + Mask Snorkel Silicone Set for 8-12.5 US Foot Size Material: polycarbonate lens, durable and longlasting use.US Size: 8 - 12.5 This 3 pieces diving set is designed for children.To learn the dolphin swimming style Child-sized soft silicone mouthpiece, light weight and comfortable to wear. Ideal for swimming, diving, snorkeling and so on. Easy to adjust silicone strap with swivel buckles for easy adjustment, even while wearing the mask Package: 1 x Mask ,1 x Snorkel , 1 pair x Fin. Note: it fits for 4-5 years old standard size