SUUNTO M-9 Compass Used Masks a full-length diagonal zipper allows

a full-length diagonal zipper allows you to put it on and take off by simply stepping into it

Air balanced flow-through piston provides constant and effortless airflow unaffected by depth

Low profile 1-window design

Unidirectional bezel clearly marked for tracking dive time

SUUNTO M-9 Compass Used Masks a full-length diagonal zipper allowsHandy and reliable wrist compass for navigating around town or the country Employs Suunto's two zone system for reliable readings in northern hemisphere Serrated bezel ring turns easily even when you're wearing gloves Ratchet mechanism for setting direction; jewel bearing and side reading window