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K9 Sport Sack - Canada

K9 Booster Block


Sizing your dog for a K9 Sport Sack® isn't an exact science. If your dog is in between sizes, has a wide body but short in length, or is still growing, the Booster Block fits snuggly in the bottom of your K9 Sport Sack to boost your dog up 3" (7.62 cm). It helps make the K9 Sport Sack experience more comfortable for you and your dog.

  • Constructed of sturdy, quality foam
  • Removable, washable cloth cover
  • Use two blocks for a 6" lift
  • XS/S measures 3" tall * 8" wide * 5" deep (7.62 cm * 20.32 cm * 12.7 cm)
  • XS/S are interchangeable between XS and S sized backpacks
  • M/L measures 3" tall * 10" wide * 6" deep (7.62 cm * 25.4 cm * 15.24 cm)
  • M/L are interchangeable between M and L sized backpacks and are also compatible with XL and XXL if necessary

    Shipping, Warranty, & Returns


    In order to save you time and money on shipping, import, and duties costs, products from are shipped directly from our 3rd party logistics company in Toronto, Canada.

    For more information regarding shipping and times, 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 excluding original shipping costs (Also excludes klearance and custom items). Learn more about our policy here.

      Customer Reviews

      Based on 115 reviews
      Bruce A
      Works great!

      Works great and made my dog more comfortable.

      Ben Grimes

      Talk about the happiest dog in the world, Murphy loves it. Wish I had one sooner, definitely worth it.

      Reeve Friesen
      Excellent product

      It’s exactly as described and built very well. If your pup needs a little extra boost in the pack this is perfect

      Ashley Boey
      Great product

      So far so good, used it twice and it's the cutest thing :)

      D I Cassel
      Perfect addition

      Booster block is perfect addition to the pack….enjoying more adventures with my little guy…he loves that he now goes pretty much everywhere with me, in comfort when he gets tired