Quality Dark Navy Blue Grateful Dead Red Rocks Amphitheatre Concert T-Shirt. "Officially Licensed Grateful Dead." Short Sleeve. The date on the shirt is August 11, 12, 13, 1987 and the 13th was the last concert the Grateful Dead performed at Red Rocks in Morrison, Colorado. Exceptional condition. This is unisex and can be worn by a man or woman - see photos with measurements. It was a gift but it is too small for me. Hoping another Deadhead can enjoy and appreciate this shirt.