Aqua Case Medium (3.9" x 2.5" x.98") 100% waterproof submersible to 100 ft (30m) Dust-tight, sand-proof and shockproof No problem for sea or salty water Heat resistant to 70 degrees Celsius - suitable for hot springs, saunas and Jacuzzis Cold resistant to minus 20 degrees Celsius - suitable for skiing and snowboarding