It isn't as comfortable as other frameless masks such as the Cressi F1 mask. We believe that Hollis have tried out to enhance rigidity with the mask for toughness and safety by strengthening the skirt content which suggests it can pinch and dig When the mask is not a suitable https://howtomakeasiliconemask05949.blog4youth.com/28896149/5-simple-techniques-for-silicone-laryngeal-mask-price