This is the I-Armor model. Designed ergonomically for extra stability with a contoured lens shape for better peripheral vision. It features an optional neoprene leash/strap for added security. The nosepiece is a flexible silicon material to make a more comfortable, flexible fit. The temple arms are flexible and fit snug on any size face. Comes with a protective carry case to prevent it from getting scrateched or damaged. These glasses meet ASTM and CE ball impact testing requirements and are approved for use in all leagues and tournaments