The Bobster Beginner MX1 off road goggle offers all the protection and clarity that you need while tearing it up in the dirt. Equipped with high grade foam and an air flow system using frame vents, fogging is prevented. The adjustable strap can be tightened to the desired length for ultimate security. The adjustable strap come standard with silicone non slip strips to keep your goggle in place during the roughest of rides. These are especially ideal for kids and beginners who are just starting out. *Please note that while these glasses would presumably pass ANSI Z87.1-2010 standards, they are NOT certified, and are therefore not endorsed as safety eyewear by Safety Glasses USA.