Features of the Oakley Line Miner XM Goggle Original line miner goggle was created with the purpose of providing the ultimate in peripheral vision, with a cylindrical style design Low-profile frame design provides increased visibility and improved helmet compatibility, and Features an expanded lens volume for optimized peripheral vision and a 40mm wide adjustable strap Integrated frame strap anchor slots ensure a secure Fit over helmets, and discreet frame notches under strap anchors provide compatibility with most R X frames