K.D. Waltner is Adidas’ Global Design Director for Running Apparel, but when he’s not making the big bucks designing gear for the world’s top athletes, he has his own line of bags. This Friday, in a First Friday exhibition at Tilde (7919 SE 13th, 6-9 pm) he will be showing 12 custom versions of the Trapez (German for “trapeze”), each hand painted by Waltner in his basement. Underscoring the functional art aspect of the product, the store will be exhibiting the bags as visual art pieces mounted on the walls, though I think if you wanted to take one home and fill it with stuff that could probably be arranged—the Trapez comes in three different sizes, depending on whether you need a laptop, and if so, what size. Here is #1 of 12: