Bachelor t-shirt

I need to wash fewer shirts in winter because I wear a t-shirt. Unless I perspire excessively I can wear the upper shirt again. More if I have a cold and can’t smell test effectively. This effect could be enhanced with some silver ions (see a product called Agion) embedded in the arm pit areas. Your regular shirt should have this as well of course. Now during summer a mesh t-shirt or finer fabric undershirt will allow you to stay cool. Thin white t-shirts take less space, don’t need ironing, dry faster, and if wrinkled no one sees. Helps the environment but since we might destroy that anyway the bigger benefit is that it would significantly reduce laundry days so you can enjoy what environment remains.