Once, not long ago, the mention of “hemp T-shirts” would have evoked images of coarse smocks from patchouli-scented shops—and even elicited giggles from fashion folks. A lot can change in a short time. These days, you’d have to be living under a rock (in a state without legalization) to miss that cannabis is having a moment. And that’s cannabis in all its many forms. Everyone from young adults to octogenarians are giving it a try, ingesting THC gummies for sleep and tinctures for pain; slathering on CBD balms for sore muscles and face serums to promote healthy skin. It’s not surprising then that the apparel industry would be embracing it too.…