The Silicone FunSet SD for kids is a great value in a quality starter set your kids will enjoy wearing in the pool, at the beach, even in the bathtub!Funset 2-window Silicone Kids Mask:Premium quality clear silicone Flexible strap has locking buckle which is easy for children to adjust Dual tempered glass lenses Semi-dry Junior Snorkel:One-way purge valve for ease of clearing water Splash-guard top minimizes water entry while on the surface Substantial bite tabs Built-in adjustable, quick-release snorkel keeper