These Unisex Blue X-Ray 4Arms go great with our skeleton kit that has had a few "fixes" here and there. Probably someone who had a mantra of, "Sticks and stones may break my bones, but I'll do anything to keep running!" Also, a great if you like to live life with the philosophy of total transparency. While INKnBURN inks don't glow in the dark, this kit looks amazing under blue light. The black drops away and all you see are the luminous bones! Great for a Halloween-themed run, but this is also a design that will turn heads any time of year. Size chart is in the photos and under the Features Tab!