It’s somewhat pricier than other simple snorkel masks around, but let me inform you this issue was a video game-changer for me. With the ability to breathe Ordinarily through my nose underwater made this mask completely well worth each and every penny! There are a few differing types of locks. https://angelofbshw.liberty-blog.com/32315891/5-simple-statements-about-what-not-to-bring-to-cancun-explained