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

The A1 offers full time-keeping functions

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

Ergonomic heel cover

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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.