Adjustable Clip On Sunglasses #52 Square vs Joopin Polarized Clip-On Flip Up Sunglasses

The Joopin 2-pack is the safer buy for most people: two polarized flip-up pairs, a cleaning cloth and a polarized test card, backed by 341 ratings at 4.3. The Series #52 is the better fit for anyone with wide or awkwardly shaped frames, because its spring bridge and four soft silicone pivot points adjust to the glasses instead of relying on a fixed clip. Reviewers of clip-ons in this class praise the flip-up hinge and complain about clips that loosen or scratch lenses, so the Joopin's hinge and the Series #52's silicone pivots are the features that matter most.

• Choose the Series #52 if your glasses are wide or unusually shaped and you want a spring bridge and soft silicone pivots that adjust to fit, plus a lifetime warranty.
• Choose the Joopin if you want two polarized flip-up pairs with a cleaning cloth and test card, and you prefer the flip-up hinge for driving and quick indoor-outdoor switching.