Reign VMX Universal Goggle Insert This Universal Rx Goggle Insert lets you convert virtually any standard goggle to prescription in seconds. Made of ultra flexible, durable, and lightweight TR90 material, this sub-frame uses four arms to keep it securely positioned inside your goggles. Simply take the insert to your optics shop, and have them put your prescription in (no pattern needed, they have the tools to measure the frame for it). Youll no longer be limited to over the glasses style goggles, nor have to risk damage to your regular eyeglasses. Our insert can be easily moved from goggle to goggle, and will last for years! Goggles shown not included