Plenty Package: come with 4 pieces of universal RX goggle inserts, which let you convert virtually any standard goggle to prescription in seconds And the enough quantity can satisfy your daily use and replacement, also sets for your family and surrounding people Quality Materials: these snowboard goggle RX insert optical adaptors are made of TR90 material, which are flexible, durable and lightweight The ski goggle adaptors fit into any adult size ski goggle well by way of the sub frame uses four 'arms' to keep it securely positioned inside your goggles Stabilize Your Glasses: no longer be limited to 'over the glasses' style goggles, nor have to risk damage to your regular eyeglasses, just use our ski and snowboard goggle insert adaptor, which can better stabilize your glasses, making the glasses difficult to slide, and won't cause the line of sight to be affected, also can be easily moved from goggle to goggle Widely Applicable: our universal inserts can be widely compatible with most goggle models, including but not limited to ski goggles, motorcycle goggles and military goggles, simple and convenient to use Practical Gifts to Share: with considerate design and simple installation, these are feasible to be sent as thoughtful gifts to your friends, colleagues, classmates, parents, relatives and some others who love skiing, making them feel your sincere thoughts