Half-Rim Sunglasses: Shape and Fit

Half-rim sunglasses have a frame around part of the lens, commonly along the upper edge, with the lower edge left open. You may also see similar styles described as semi-rim or semi-rimless.

What does a half-rim shield look like?

A shield uses one broad lens across both eyes. In a half-rim shield, the frame supports part of that lens without enclosing its entire edge. Our Shield Cycling Sunglasses, for example, pair a defined upper frame with an open lower lens edge and adjustable nose pads.

Half-rim lilac shield sunglasses with an open lower lens edge — **Half-rim.** Follow the purple upper frame, then look at the lower lens edge: there is no rim enclosing it.

Full-rim black cycling shield sunglasses with a rim around the lower lens edge — **Full-rim.** Follow the black frame around the lens. The lower edge is enclosed as well as the upper edge.

Compare three frame styles

Frame style	What to look for
Full-rim	A frame that surrounds the lens edge
Half-rim	A frame around part of the lens, with another edge left open
Rimless	A lens mounted without a surrounding rim

Each style has a different outline and supports the lens in a different way. Lens materials and features vary by pair, so compare UV protection, polarization and photochromic options alongside the frame shape.

Choose by proportions and fit

The open lower edge gives a half-rim frame its distinctive outline. For a comfortable fit, compare frame width, lens height and temple length with glasses you already enjoy wearing. Consider the lens curve and nose support, too.

For cycling, try the glasses with your helmet. Adjust the nose pads on styles that offer them, following the care and fit instructions for your pair. Check that the lens clears your eyelashes and cheeks and that the temples sit comfortably.

Half-rim cycling shield sunglasses worn on the face with the lower edge open — **See the proportions on the face.** An open lower edge gives the shield its outline. Check your own fit at the nose, cheeks and temples before riding.

Care for the open lens edge

Follow your pair's cleaning and storage instructions. Avoid gripping or pressing hard on the exposed lens edge. Rinse away dust before wiping with a clean, soft microfiber cloth and store the glasses away from heat and pressure.

Shop half-rim sunglasses or use our sunglasses fit guide to compare measurements.

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