If ever there was a T-Shirt made for working out, this is it. The shirt was developed as part of a branding effort by Toronto based personal trainer, Roland Semprie. The shirt features sweat markers divided by interval of time from 15 minutes to 60. Creative? Indeed. Unfortunately the shirts do not look like they are for sale, but, if you’re in the Toronto area and is looking to get into shape then maybe check this guy out – he might throw in a free shirt!