I purchased this specialty backpack designed to hold a small dog when hiking/biking a few years back, but unfortunately my dog wasn't having it.

It's a very high quality item, the current price online including shipping from Germany is over $350. It's a Tarigs MountainRock Backpack, I have the Medium in Light Gray.

Attaching a link to the item and the dimensions. There is a mesh window that also rolls upon as shown in the photo. Apparently some dogs love it based on the reviews!

Asking $125.

Please contact me via email if you're interested.