The $10 t-shirt deal of the day over at RIPT Apparel today is a mash-up of Mario Kart and Supernatural called “Supernatural Kart” by Byway.

The shirt went on sale at RIPT today, Sunday, July 29, 2012, at midnight CST, and will continue for 24 hours from then, and once it’s over, it will not be sold on the site anymore.

The t-shirt is available in men’s (through 3XL) and women’s sizes for $10 each in charcoal. Kids sizes are $15 (Boys, Girls, and Toddlers in charcoal); Onesies are $18 (in charcoal). You can also get the design on a Hoodie for $38 (in Men/Unisex sizes in charcoal).

From the artist:

Anything the Mario Brothers can do the Winchester Brothers can do just as well, like racing around in tiny karts firing weapons…although Sam and Dean leave race courses a bit more blood and slime splattered than Mario and Luigi. This T-shirt is a follow up to my ‘Supernatural Bros.’ design which RIPT sold previously but comes with added Castiel!

What do you think of this design?