Open Box Hollis M4 Frameless Mask Diving Essentials The A1 offers full time-keeping

The A1 offers full time-keeping functions

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providing effortless airflow under all dive conditions

allowing the user to upgrade from the analog depth gauge to the compact Puck capsule computer in the future

Ergonomic heel cover

Open Box Hollis M4 Frameless Mask Diving Essentials The A1 offers full time-keepingPlease note this is an OPEN BOX offer. The item will be in new condition, but may not have original packaging. PRODUCT DESCRIPTION When choosing a mask, fit and field of vision come first. The M 4 gives you the best of both worlds, fitting a wide variety of faces and offering superior peripheral and vertical vision. It is low profile, stows easy and carries an excellent value. This product does not carry a valid manufacturers warranty.