Solarbat polarized performance eyewear features special base curve alignment and thickness variations to eliminate all eyestrain and enhance visual acuity. The frame features special Temperature Controlled Grips on the temples and nose pads to keep it from slipping in hot, humid weather. The lenses thickness surpasses U.S. government standards for impact resistance and come in multiple shades to fit most fishing conditions. Contact Solarbat (800) 761-8228; www.solarbat.com