These polarized flip up fishing sunglasses feature a unique design concept. They clip directly to the brim of your favorite fishing cap. Called the Vexilar Brimz, this unique product has proven to be very popular with winter anglers in field tests. For years, going from the relative darkness of a fishing shelter to the stark white of a snow covered lake may cause eye strain, headaches or even long-term eye damage. The contoured shape of the Vexilar Brimz flip up sunglasses deliver maximum protection from UV rays but are not designed to be used over existing glasses. Any ice fishermen coming in from the cold knows it is a hassle storing your foggy sunglasses in a safe place. With a touch of your finger, the Vexilar Brimz flip up sunglasses swing out of your way and fit tightly under the brim of your cap. Available in two polarized lens colors, brown and smoke.