Callaway Golf Men's Razr Hyperlite Sunglasses Lens: Neox NX14 - 2nd generation high performance NEOX formula - Enhanced distance vision - Superior depth perception - Slightly darker Blue Grey, 14% light transmission Frame: Tech/Performance Style - Magnesium/Aluminum alloy construction - Lightweight yet highly durable material - Semi-rimless designs equals zero distraction Fit: Med - Large Head Shape - Adjustable nosepiece - Megol rubber nose and ear tips allows for secure 'non-slip' retention - Ergonomically wrapped temple