Timex took the Ironman name from triathlon finish lines to wrists everywhere, and GPS sports watches such as the Ironman R300 carry on that pace-and-distance tradition. Training watches meet sweat, kerbs and gym kit weekly, so a Timex screen protector is cheap insurance for the face that displays your splits. Anti-glare finishes stay readable on sunny runs, smudge-resistant coatings see off fingerprints and sweat, and crystal-clear versions protect without changing the look. Use the filters to find your Timex, then size up the smartwatch screen protector types in our comparison tool.