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K9 Sport Sack

K9 Sport Sack® PLUS 2

$80.95 $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.

View More Sizing Instruction

  • 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

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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 388 reviews
    Could not be happier!

    I am so happy K9SS Plus 2! I can’t wait to go on an adventure with my fluffy pal. We’ve only made it to the hardware store and the vet; it was a perfect post-spay assist. It’s comfortable to wear and while I was worried about getting my puppy in - she doesn’t even make putting her harness on easy - with cajoling and treats, we did it. It’s so well designed. I look forward to hikes and bike rides in our future. She’s about 12 pounds and about 17 in. from base of head to base of tail. The medium is still a bit big but a rolled up towel at the bottom works. She may grow.

    love this and so does my dog!

    I love this sack so much I had to order a second one for my smaller pup immediately. My corgi loves it a lot. I had to exchange for a smaller size, and K9 was quick to help and made the whole process very easy! Thank you so much!!

    Haley B

    This is my third canine sport sack. Previously I’ve tried different sizes and had the original design. My little 17 pound shihtzu poodle absolutely adores this backpack. He goes wild whenever he sees me pull it out of the closet. It’s not only great for when we have to go place to place by public transit, but it’s also wonderful for some upright time after feeding him because he has a little bit of acid reflux.

    My first impressions with the canine sport sack plus 2 are how great the fasteners have been improved and how there’s so much more padding at my shoulders and underneath my dogs rump while he’s in the bag. I’ll be interested to see how putting the attached bag to the backpack will work, but so far it’s been great. I am a repeat customer and I’ll probably keep buying from them in the future.

    The Perfect Pack!

    These backpacks met our needs and expectations perfectly! Our pups didn't even need any extended introduction as the very first time we tried them, they were able to get comfortable right away and now, when we pull the packs out, they're literally jumping into them! Our pups are comfortable, cozy, secure and supported with the K9 sport sack plus 2. We are very happy with our purchase and feel the quality and value of the sport sack is absolutely worth it!

    Jeffrey Mason
    K9 PLUS 2

    perfect fit , great quality . my wife loves and puppy