K9 Sport Sack Trainer - Large Dog Carrier Backpack for Hiking, Biking & Travel | Eclipse Design | Hands-Free Pet Carrier for Active Dogs (Large, Eclipse)

This bag took a few times to get the hang of getting my boy into it and onto my back. I have a heavy boy - Frenchie at 33-solid-pounds. He's like a kettle bell. He's also taller than most frenchies with an 18-inch back length, 17-inch neck and 25-inch chest girth. My boy also likes to stand, he's not much of a sitting dog, so in his bag he stands up a lot. The bottom of the bag has a nice solid block, which is perfect for my boy, since he likes to stand. If you've got a heavy pup I recommend having a friend help you put your dog on your back, or using the table method. The first time I went out, it was around 35-degrees cold outside so I was wearing a wool coat and had him on my back, biking. THAT WAS PROBABLY THE HARDEST BIKE RIDE I HAVE DONE IN A LONG WHILE. I was regretting it after 3 blocks uphill...SO MUCH SO, that the ride back, I opted for the bus back home. Second time I took him out (2 days later) it was a nicer 65 degree weather day and I didn't need to wear a coat. THAT RIDE WAS SOOOO MUCH EASIER! I've included photos of both rides. It took me a few times to get the hang of getting him inside the bag, (for him too) but by the time I did it 6 or 7 times in and out the bag - we both had it down to a science and its way less awkward. I'd practice with your pup before you go out. The other thing about this is - if your dog likes to stand (like mine) be sure you don't mind your dog being above your head. They are meant to be positioned slightly above your shoulders anyway, but if you've got a dog that likes to stand - be sure you're not going to be bothered. On my second bike ride, my boy was more comfortable and I could feel him standing up taller and taller - at one point he had moved both paws to one side of my shoulder, so he was sitting over my shoulder hanging out. LOL. I didn't mind it at all, but my partner kept asking me if it was okay because it looked like it wasn't comfortable. Also, be sure to cinch so your pup is secure (not cut off) and thread the collar strap through the zipper loop and secure him to the carabiner. That gives you comfort that your dog won't suddenly jump out of the bag while you're riding or hiking. Also, I noted that the tag for the bag looked a little different than the actual product. the Lumbar strap is actually lower that shown. But also, the lumbar strap doesn't do much for me, since my boy stood about 90% of the time in the bag.