Sportsstuff Chariot Warbird 2, 1-2 Rider Towable Tube for Boating with Dual Tow Points

In one of the 4 pictures on the listing there is a sun shade, is that included? Not indicated in discreption.

Has anyone noticed how the tube doesn't slide out freely when you whip out in a hard turn? It seems to grab at the half way mark and turns back in

Does it submerg

Which is better, Big Mable or Chariot Warbird 2. What is the practical difference, thanks.