Mares Underwater Slate Lanyards The Mares XR SMB is

The Mares XR SMB is a completely closed cell SMB that is available in either Orange for general and positional use or Yellow to signify emergencies

Seat Saving Orifice valve design and manual override knob to reduce regulator sensitivity during entries or exits

The result is Freedom Technology

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Mares Underwater Slate Lanyards The Mares XR SMB isMares Underwater Slate and Pencil with quick disconnect clip ideal for note making either underwater or in wet conditions where paper just won't do the job. Complete with a pencil attached on an rubber tube cord. Also features a quick release snaplock retainer ideal to attach to your bcd when not in use. Durable shatterproof plastic slate. Excellent size for the odd chat underwater noting down dive details or even all the fishy encounters you have.