Run the shirt to death, then biodegrade it with the Janji Women's Runterra Bio Tee. This extremely soft and durable tee uses special technologies to maintain thermal, vapor, and odor regulation during your run to keep you as comfortable as your bed. Not only can you make a difference in your life with how far you can run in this tee, but you can also help the next generation as this tee will biodegrade in oxygen-deprived environments (i.e. landfill) in four years compared to the 400 years it takes for conventional polyester. We do warn however that this tee is not pre-shrunk and could shrink up to half a size.