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 340 reviews
    Sebastian Contreras
    Comfy for me and my dog

    Fits well on my back and Tiba seemed to be very calm.

    Impressive Plus 2 - fantastic!

    First I was a bit reluctant to buy one as customer located in Germany (shipment, taxes, duties). However, everything worked out fine. The sizing info (size S + booster block) helped a lot to place the order at ease. Fast payment with Apple Pay. Thanks to the whole K9 team!

    After introducing the sack to our dog (Petit Brabancon, 5 kg) she got in quickly, and what can I say? - She enjoys being so close to me and she really loves the product!! We can’t wait to go on short bike tours into the woods or lakes nearby. For us the sports sack is just for getting quickly to a place where our dog can walk and enjoy nature on her paws.

    Hope K9 opens a Sales / Service Center in Germany or at least Europe soon! More Europeans would hop on the train then.

    Margaret Black
    Sport Sack is a Game-Changer!

    We are loving our Sport Sack! We use it so our little, eleven year old Shih Tzu can go on bike rides to hiking destinations; on long hikes, so he can take a break and be carried.

    Based on measurements, we thought the size small would work, but it turned out that medium fits him to a tee! Great product... and great customer service, when we asked to make an size exchange!

    Laura White
    Love It!

    We visit a lot of national parks and Gus gets very tired walking. This backpack works great!! We feel he can go everywhere with us and he loves it too

    Lucas Ezequiel Seewald

    We love our backpack! it's amazing!