Our most popular frame, the black ZÜCA frame has a telescoping handle, noiseless wheels (they flash!), and a 300-pound weight capacity.  Yes, you can sit on it!  The Black frame goes well with almost any insert, but especially the ones with black zippers. To name a few:  "Caution" (bright orange); "Lilac" (light purple with rhinestones); "Bosco" (forest green); and "Jamaica" (blue w/ pink/white & green flowers).