This will depend on which pair you purchase, as well as the shape of your face and head. However, a good quality pair of safety glasses will be designed with comfort in mind – look out for pairs which feature: A light-weight design, which won’t feel heavy on your face, ergonomic design, Nose pieces and arms coated in rubber or another soft, flexible material, Adjustable arms or straps. If you find a particular pair uncomfortable, most reputable suppliers will be happy to refund you so you can try a different type.