My daughter bought this set as she is an avid snorkel fan in our pool.  The plastic is durable, mask doesn't fog up, and she loves it.  The mask guard really keeps water out of her nose.  The size seems great for teens or small adults.

I had a hard time attaching the snorkel to the mask so I just swim with the snorkel unattached

So glad I selected this set of snorkel gear! such a good item for the price!! My husband uses them to clean our pool and he just thinks they are perfect for him!

it fit the mask was clear and my wife loved it.

headstrap is too short and I experience the attached airtube is
apt to loose off .

Mask and snorkel combo worked well for teenagers and adults.  Waves did not knock it free.  It maintained a tight seal.  It did not fog up.  The wide tube made made breathing easier even under the stress of fighting a head current.  Mask was easy to put on, and wide enough for a good view of the fish and coral in the Caribbean.