Nothing scientific here to share. Just was having issues with my current set up printing more than I like to n lighter clothes. Contacted Tony from JM and he allowed quick ship if I stayed black. If USPS didn’t screw up as usual I’d have had it in a weeks time from ordering.
Just got it and man it conceals and stays put. Time, sweat and moving around this week will tell the final tale.
I normally wear a large shirt, this is a shrunken medium.