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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

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. Learn more about our policy here.


    If you end up with incorrect sizing don't worry! All size exchanges within 60 days are free! Learn more about our policy here.

    Customer Reviews

    Based on 294 reviews
    love it!

    This backpack is so cool! Our dog is happy to get in the backpack and now we can take him on bike rides with us! We couldn't like it more!

    A must to take your pupper anywhere

    I have a 14 lb Rat Terrier who absolutely loves the sport sack. She has developed separation anxiety from me and will shake if she sees me pack a bag or knows that I am leaving her. Even in car rides she will shake sometimes until I put her in my lap with me. She also suffers from little dog syndrome and will go after other dogs when on a leash. This prevents me from taking her anywhere due to not wanting to disrupt anyone and their well behaved dog. The sport sack allows me to take her on those shorter trips to Lowes, walking around the subdivision, on my scooter, etc. She doesn't have the ability to go after the other dogs anymore and she feels so safe and secure snuggles up to my back! I recommend everyone who has a little dog in my life to go get one!

    Highly recommend

    We bought this backpack as we have started cycling way more to get around our city (London) since the start of the pandemic, and it's not always safe to ride with Zorro our dog on the leash alongside. This was a great solution that helps us go further and still be able to take him along. He's quickly realised that the backpack means we are going somewhere great, and whilst he doesn't yet get into it on his own haha he cooperates pretty well after only three times. Good quality and good functionality. Wouldn't mind a more urban design in bigger sizes. Zorro is 15.5kg.

    So Far So Good!

    We got this for our 35 lb Shiba Inu. He's bigger for his breed, so was very happy to find a backpack that would accommodate him. It fits him perfectly! We haven't tried it out outside of the house yet (still trying to get him used to it), but overall he seems to be comfortable in it. Can't wait to continue to use it!

    Free Rides

    Absolutely loved this backpack for my baby girl Penn. As you can see she was happy just to be with me and strolling along while not getting even more tired. She is 12 and I want to walk longer so I put her in the back pack. Others walked by and said "Look she is sleeping" so that must mean she was pretty comfy!