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K9 Sport Sack

K9 Sport Sack® PLUS 2

$80.70 $94.95

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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.

For Dogs Ranging 8-40 lbs (4-18 kgs)

Sizing chart, measuring the length of your dog from its collar to the base of its tail. Small 13-17 inches. Medium 17-20 inches. Large 20-23 inches.

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  • 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

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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: A variety of UPS shipping methods are available. Please allow for 1-2 days of packaging before your item ships, 2-5 days if ordering a waterproofed or custom item.

    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 376 reviews
    Wilmar Horacio Gracia #101874
    Perfect carrier for my Ivy to go out!

    Very helpful, my puppy was already big (8Kg) but not ready to walk outside due to missing vaccines (4 months old), and the soft carrier we previously had did not help anymore due to her size, once the sack arrives it was so comfortable that we take a walk for her to get used going outside and to the sack, also was great to walk ahead to veterinarian for missing vaccines and lastly for sterilization surgery here she was heavier (almost 10kg), we enjoyed a bike ride a week before the surgery and was awesome, she was looking over my shoulders both sides without impacting my balance, see pics and video, audio is in spanish lol.

    First pic was my bad, I was learning and did not adjusted my shoulder straps and was too low at my back, but she was confy already :) compared with bike ones, you can see her paws are over my shoulders there.

    Best decision to upgrade from trainer bag

    Luigi is a 25 lb French Bulldog living in NYC. We started him with the K9 Sport Sack trainer bag since he was about 5 months (he's currently 1 year and 3 months) mainly because 1) I have never trained a dog to go into a bag/backpack and 2) the price of the trainer is significantly less than the K9 Sport Sack plus 2.

    After much deliberation, I finally decided to upgrade to the plus 2 in April 2021 and after seven months of using the bag I couldn't be happier.
    - The shoulder straps are 100% more comfortable than the trainer. ** This alone is worth the upgrade from the trainer**
    - Storage Attachment holds basically everything you would need and more.
    - The Fur Flap. I cannot explain the amount of times the trainer bag zipper would get caught on part of the bag. Not an issue with the Plus 2.
    - The Side pockets. 100% of the times i use these for his water bottle and mine.

    - The only con I've experienced with the Plus 2 is that the backpack is extremely awkward/uncomfortable to wear when you have the storage attachment filled and clipped on but no dog in the actual bag. I've gotten around this issue by simply putting the storage attachment in the bag until Luigi is ready to go in.

    tracy frame
    Love it

    We got the K9 trainer when Sparky was a pup. For his first birthday we got him the Spot Sack 2.

    Lindsey Ng

    I love carry my corgi in the backpack. It fits perfectly for him and Goten seems to enjoy the ride.

    Super fun for the dog and owner as well. The backpack is sleek and has a great design. I'm 100% satisfied with the colour I chose.

    The mechanism is pretty secure as well as long as you tighten and follow the instructions properly. Sometimes I feel he wants to jump out but he never can with how secure the buckles are.

    Perfect for my Schipperke

    We have now used this on multiple hikes and I have to say I am very pleased with how it has performed. My girl is losing weight and older so sometimes needs a break during our hikes. She settles right in and is perfectly happy.