Details
Rigid Short Clear or Black
The most popular model. The one people get when they're not sure what to get. RIGID; made of allergy-free rigid silicone which doesn't stretch much. The aperture (the hole in the middle of chassis which your spectacle temple tips slide through) is about 3mm. At most, it stretches to about 6mm. (Slightly more if you warm them up a bit first by dropping them into hot water for about 30 seconds.) As such, it's ideal for spectacle temple tips that have a cross-sectional diameter of about 3-6mm. The kind of temple tips one usually finds with metal frames that is. This is in contrast to sunglasses temple tips which measure at 10-12mm. SHORT means that the hook portion (the part that goes over your ears to stop your spectacles from moving forward) is short compared to the hook lengths of other models. It works just fine in stopping your glasses from slipping and is very comfortable when worn, but the specific advantage of a short hook over a long hook is that it's almost unnoticeable when worn.
