I actually have the Tourmaster Intake Air 5.0, TM Draft Air 3.0, TM Transition 4, and the Helite Turtle 2, and the four are Hi-Viz.
I do not feel that they get dingy except maybe a tad bit around the collar or neck line.
I wash them gently at the "end" of the riding season, if necessary; and I do ride year-round and in the rain. Even by the end of the riding season, from a short distance, I do not feel any soiled appearance is apparent.
Hi-viz (or white), cannot go wrong 👍
2014 CTX700 white (totaled by deer)
2014 CTX1300 Red Enchantress (current)
"We travel not to escape life, but for life not to escape us." & so, "The roads we map...map us." - Shane
Surround yourself with the best people you can find, delegate authority, and don't interfere as long as the policy you've decided upon is being carried out
. - Ronald Reagan