Aqua Sphere Eagle Optical Swim GoggleFEATURES Hypoallergenic silicone skirt and strap for long lasting comfort One piece construction "Pop and Swap" lenses if you want to add optical lenses Anti fog Scratch resistant UVA UVB protected lenses The Aqua Sphere Eagle Optical Swim Goggle is packed with features and designed specifically for those who require a prescription. The lenses are available to purchase separately in half step dioptre increments from 1. 5 to 6. 0, with a simple "pop