This is a fantastic Genesis Glance Two Lens Mask for Snorkeling and SCUBA DivingFeatures of this wonderful mask include: Double lens Ovalized teardrop lens shape Low volume Crystal silicone skirt and strap Quick release buckles Tempered glass The Glance is a lightweight and comfortable two lens mask. The ovalized teardrop shape lens and low volume provide optimal and view. Which is great for snorkeling and diving. Also available in a purge model. MSK513