Wearing glasses or having a beard can sometimes present challenges with mask fit. However, there are mask styles and sizes available that can be accommodating. Masks with a smaller profile or nasal pillow masks generally work better for individuals with glasses, while masks with adjustable headgear can often be better for individuals with facial hair.
Nasal Pillow masks are designed with the least contact with the skin. They instead use two cones that sit on the entrance to the nostrils.
If you require a full face mask, those with beards are advised to use a gel mask if possible, as the cushions are usually more adaptable and can often compensate for facial hair better than a regular silicone mask.