One more athletics market: martial arts. If you train judo/jiujitsu, your existing uniform is a heavy cotton or cotton/poly weave that is built to last through the abuse of training partners gripping and yanking it every which way - and the existing stuff works, but it's bulky to carry and hard to wash. A modernized uniform that can retain the same strength at a lighter weight would be of practical interest.
A much closer application in Jiu Jitsu would be replacing the rash guard that many people wear under their gi, or in nogi. Or replacing a surfer's rash guard, for that matter. Tons of applications for this.
