T-shirt Underwear

So I found a website that suggested turning old t-shirts into underwear and I think it’s a great idea that I’m going to try at some point. I have a few t-shirts that could be put to good re-use this way but I’ll probably make a trip to the goodwill and see what else I can pick up for $1 (since t-shirts are a buck at the local goodwill’s and this way I can try making a couple out of shirts I don’t care about first as well.)