It is not as comfy as other frameless masks including the Cressi F1 mask. We believe Hollis have experimented with to improve rigidity with the mask for sturdiness and safety by strengthening the skirt product meaning it may possibly pinch and dig In the event the mask is not really https://howtomakeasiliconemask83826.activablog.com/27680241/fascination-about-silicone-mask-realistic-price