The snorkel has performed well in both calm and rough seas. The only negitive I have noted is the snorkel keeper. It is difficult to remove the snorkel and after repetive use the keeper broke.
Good vaule for the money and I would recommend it to anyone that is looking for a good snorkel.
It clears easy, and the long tube keeps it out of the waves...
Used for diving and snorkeling in Florida and Hawaii. Quality product. Good value for the money.