We really can't explain it better than Wikipedia. Since we are over a 130 year old Towel company, we have to honor Douglas Adam's love of towels with a special. FREE Freight on our Classic Super Gym with it's ribbed terry cloth and athletic PINK striping is a perfect companion for interstellar travel. Plus the design is classic being around the sun over 70 years without changes. We sell the towel also as a great Pink Tour Caddy too. Now gentlemen, don't panic that it's pink, it still is a perfect companion. The offer is good for shipping within the 48 contiguous states, and for orders placed May 25th.