Lightly used K9 Sportsac Knavigate backpack for holding dog when you hike. Size MEDIUM. Retails for $189.99 new. These were created with vets to ensure comfort & safety for your dog. I used this a few times for my pug & it worked great. Please see sizing guideline. You measure from neck to base of tail, details in the 5th picture. This is in great condition (just a few spots with dirt that can be cleaned). & has a large pocket on bottom for storing gear, and two side pockets for water bottles, and small waistband pocket for keys, treats. I would carry his leash, water bottle, bowl in the lower pocket and my water in side pockets. You can fit quite a bit in here. My sweet boy went to the Rainbow Bridge which is why I'm selling. I'm saving to get a smaller one for my small dog. The last two pictures are us using it, he would sleep in it as it was so comfortable ♡