Eye Care 4 U Vision has these Folding Clip on Sunglasses that are perfect for many different activities. 

Our folding clip-on are the first in the market that have been constructed into a compact, folding style that fit effortlessly into a hard clam case, which fits into your pocket/handbag. Simply wear, fold, unfold and wear again. High definition polarized lenses improve contrast and visibility and block 100% harmful UVA and UVB rays. Sizes are 60cm width, 38mm depth and overall 140mm.

100% UV BLOCKING UV400 LENSES: Completely filter out all UVA and UVB radiation from the sun, giving maximum safety and preventing cataracts or other eye damage. Made from extremely strong and durable polycarbonate as used in sports and safety applications like visors and bullet proof glass. Conform to BS EN 1836:2005 + A1 2007 & EN ISO 12312-1:2013

ANTI-GLARE POLARISED LENS: Prevents glare and haze caused by reflected sunlight on roads, water and snow, by polarising the light into a single direction, enabling you to see more clearly and making your eyes more comfortable. Ideal for driving, reading on the beach and other outdoor activities like fishing, sailing, or skiing. These clip-ons can be used with prescription or non-prescription spectacles of all kinds, whether full frame, half frame or rim-less and either made of metal or plastic. 

PREMIUM QUALITY SPRING-BRIDGE: Smooth, solid and durable precision engineered spring-loaded flip-down / up mechanism that works perfectly every time and won’t break or stick.

They can be folded and inserted into the included hard clam shell case.