IST ProEar Dive Mask with Ear Covers, Scuba Diving Pressure Equalization Gear, Tempered Glass Twin Lens (Black)

IST ProEar Dive Mask with Ear Covers, Scuba Diving Pressure Equalization Gear, Tempered Glass Twin Lens (Black)EASY CLEARING — Unique tube & seal system makes equalizing easier.PREVENTS EAR ACHE — Eliminates pressure-induced ear pain.BETTER HEARING — Enhances sense of sound under water.WATERTIGHT CUPS — Keeps water out and prevents Swimmer's Ear.COMFORTABLE FIT — Head strap maximizes surface area to eliminate squeezing or pinching.