The answer to this question is largely one of preference. There are some that prefer elastic because they are easier (just slip either side over the ears rather than tying the top and bottom fabric straps) to put on and take off of your face. Alternatively, there are others who have said that the elastic straps can pull too tight and cause irritation around the back of the ears if worn for extended periods of time. As such, we offer both types so that no matter what your preference is you can choose your preferred mask! We believe that both are great products that you will love!