Designed for sport, many Nike glasses incorporate Flexon, a highly flexible and durable patented metal alloy that moves with you. Unlike conventional metal frames, Nike Flexon glasses are nearly impossible to bend or twist out of shape because their "memory metal" content allows them to return to their original form every time.

As Flexon is 25% lighter that standard metals, these frames are extremely comfortable. They are also highly resistant to metal fatigue - and easily able to withstand the rigours of sport without kinking or breaking. With the same corrosion-resistant qualities as pure titanium, colours and finishes retain their original look for longer.

Iris Optical has carried Nike frames since early 2003.