Shopping Cart

K9 Sport Sack

K9 Sport Sack® PLUS 2


The Plus 2 is a backpack dog carrier with a multi-functional storage pack. The storage pack is great for bringing gear, treats, or other necessities along on your adventures. It also acts as a support for your dog’s back, pulling your pup in snuggly against your back. Available in sizes S-L, its thicker shoulder straps and padded back panel allow for more weight and strenuous activities. The Plus 2 is our most complete carrier for small to medium sized dogs and fits dog owners small to large in build.

40 lb (18 kg) weight limit 

  • Detachable storage bag (14"x9") Don't forget your gear!
  • Fully ventilated sides for maximum refreshing air flow
  • Padded back panel for increased comfort and cooling
  • Thicker, wider, pressure relieving shoulder straps
  • Mesh dual side pockets for increased ventilation
  • Ventilated cooling side panels
  • Adjustable dual side pockets
  • Sternum strap avalanche whistle clip
  • Newly added PLUS 2 features include:
  • Wide Base to accommodate your pet and its tail
  • Adjustable Side and Back Cinch Straps to ensure the best fit
  • Fur Flap (No more zipping your dog's hair in the bag)
  • Adjustable Collar Enclosure

Compare K9 Sport Sack Carriers

View Patent Info


All K9 Sport Sack carriers are specially developed under the close direction of animal professionals, veterinarians, dog trainers, and outdoor product engineers to be ergonomic, safe, and strong.

    Shipping, Warranty & Returns


    Domestic orders: USPS Priority Mail shipping (average delivery in 2-5 days unless alternate method is selected). UPS 2nd Day Air shipping is also available.

    International orders: UPS Worldwide Expedited shipping (average delivery in 3-5 days, but varies depending on location).

    For more information regarding shipping click here.


    We cover manufacturers defects and product malfunctions for the first 60 days (Excludes klearance and custom items). Learn more about our policy here.


    If you end up with incorrect sizing don't worry! All size exchanges within 60 days are free excluding original shipping costs (Also excludes klearance and custom items). Learn more about our policy here.

    Customer Reviews

    Based on 355 reviews
    Megan Chamberlain
    Great bag

    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.

    Laura M
    Plus 2 backpack

    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!

    Justin Quintana
    Perfect Pup Pack!

    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.

    Thomas Hill
    A Calming Way to Carry

    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.

    Easy & secure

    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