Several years ago, NFC had a small batch of logo t-shirts made up to bring attention to the problem of manmade rock dams. We sold through most of what we had made up and removed them from our online store due to low volumes and size availability. These Gilden DryBlend 50% cotton/50% poly t-shirts are sport grey with a hollow black NFC “ROCK DAM BUSTER” logo on the front and a hollow black stream/dam artwork on the back. Once they are gone they are gone forever…