H2O Ninja Full Face Snorkel Mask- S/M Black

wish there was some kind of warning with this mask as theres been some conflict with people saying its unsafe because of breathing co2 in the mask. I'm told its unsafe by divers and then told theres not enough research to support this. I figured they wouldn't sell things like this if it wasn't safe.

H20 NinJa 180° WiTh The ActiOn CaM CaPtuRes CleaN Welcome ShOts & has an ExceLLenT View For SnorKliNg! I Use my NinJa H20 Mask 2 Go On Secret MissioNs Diving at Native Base Camps In BejiNg to Study TurtLes...

Awesome. Purchased another brand previous. Bad Leaks. This product is great. First time out of the box snorkel for 1 1/2 hours zero leaks.

It didn't fit my face well at all. After swimming with the mask for about 10 minutes I started getting a very bad headache. I had to stop snorkeling and leave the water for the rest of the time.

My daughter wanted this snorkel mask. She seems excited.

Fantastic product, excellent conditions

Very good product