* '''Material'''. Most hypoallergenic silicone material. This material is soft and flexes to the face for a comfortable and tight fit.
* '''Size'''. Many companies offer at least 2 sizes in a particular style full face diving mask and make sure that it fits properly by doing the "seal test". The mask should fit to your face and provide a tight water seal without you having to overtighten the strap.
* '''Skirts'''. All masks have skirts, which gives you a close and comfortable seal against the face. Opt for black skirts, which helps to block out light and give you less glare when underwater.
* '''Lenses'''. In order to get the best underwater experience, you must have corrective lenses.
* '''Strap'''. Opt for a comfortable strap that can be released from the sides of the mask by the push of the button. This will help reduce tangles and pulls on the hair, as well as have a comfortable fit.
