This modern geometric aviator functions both as an optical frame or as a sunglass frame. Semi rimless means half as heavy. Fully adjustable nose pads grip the frame to your face. Flex Beta Titanium temples add comfort while reducing weight.
Counterweights crafted from original .357 cartridges and solid sterling silver for balance and comfort.
Prescription ready, just take these to your optician. 
Counterweight: 5g
Frame front: 4.8g