Piper is a 30 pound French bulldog / Boston Terrier, we ordered a large! Definitely a two person job to put her inside the bag but she enjoyed it.

We are moving to an area we can do more hiking and such and wanted something to be able to have both our dogs in that was easy to do those types of things. The backpack is very well made and love the little backpack that attaches to it. We've tried it out a couple times now to start getting them used to it and they seem to be taking to them. My shihpoo loves to be held so she is digging it. Next will be to get them a tag with their name on it to attach to it! Thanks!

Our Australian Shepard mix pup, Peach, was definitely skeptical at first but after a few hikes and bike rides she quickly became a big fan. She's only 6 months (around 25 lbs) and fits comfortably into the large K9 Sport Sack PLUS 2 with plenty of space so it should be the only pack we need to get. She loves bike rides with the wind in her fuzzy ears and people can't help but smile when they see a cute pup in a backpack! I definitely recommend the sport sack for anyone with an adventure pup.

Over the years we have tried numerous ways of transporting our little rez dog. Nothing really supported her or made her feel comfortable until we purchased the PLUS 2. She went in and was calm during our entire hike. She's older now and has lost her vision, but she can still participate in all of our adventures. This product has improved her life as well as ours.

My lil guys is getting older and after a couple miles he’s done. Being able to include him on longer adventures again is great. Also a better workout for me carrying him.
Sits comfortably and secure on. No worrying about the zipper slipping. Loving it