PaterJoy via Amazon offers the Eartime Dual-Airway 180° Panoramic Full-Face Snorkel Mask in Black for $42.99. Coupon code "W9ICYEB5" cuts that to $17.20. With free shipping, that's $4 under last month's mention and the lowest price we could find. This 2018 model has two airway chambers that allows wearers to inhale oxygen and exhale carbon in separate tubes. Deal ends August 31.