The ProX high impact glasses/goggles come with both a pair of arms and a goggle strap. We all offer the ProX with a prescription lens option, simply click add prescription. The ProX has a soft Hypo-allergenic silicone nose bridge to absorb impacts. The frame is vented to prevent misting. The ProX can be worn like a pair of glasses with temple arms. With the press of a button inside the arms, they can be removed and exchanged for a fully adjustable goggle strap. The frame is designed to comply with CE approval for ball impact tests ASTM, BS 7930-1:1998 and USRA and ASTM F803 standards for racket and impact sports, ideal for football.