Zuca Insert Only - Muca Happy MUCA's (pronounced like ZUCA's) come from California! ait until you see the inside! The interior of this bag is pink. It is udderly beautiful. Insert bag is easy to install and remove Fits Zuca Sport Frame, sold separately in 9 fun colors. All the new bags have many improvements you asked for including: A floor panel to protect the bottom, a net pocket inside at the top of the bag, better fabric, attractive ZUCA zipper pulls that won't break, Zipper Tubes that cover the front supports and improve color coordination, cell phone pockets on both sides, the front door now opens like a door instead of flopping on the ground when open, the inside of the door is now easier to access for embroidery, higher quality zippers, improved water resistance, and many more.