Free shipping $75+US / $125+Int'l ✈️ STAY SAFE & HEALTHY


Your Cart is Empty


K9 Sport Sack

K9 Sport Sack Air Dog Carrier Backpack - Black


HUMPHREY SAYS: Your dog can experience more adventures with you in the safety and comfort of this backpack. Bring your dog to your crazy hikes, bike rides and more! Also available in Light Grey, Mint, Red and Blue.

PLEASE NOTE: K9 Sport Sack items are shipped directly from the brand, therefore can only be exchanged, and are non-refundable. K9 Sport Sack items cannot be shipped outside the United States.

Unlock a 20% coupon code towards a custom embroidered patch (name, Instagram handle, etc.) with any purchase of a K9 Sport Sack Air and Air Plus! Simply e-mail us for your discount code.


  • This classic model is the brand's original model - the one that started it all. It is the most flexible, breathable and lightweight pet carrier in the K9 Sport Sack catalog
  • Perfect for shorter hikes, bike rides and any other quick trip or outing you can dream up
  • Like all K9 Sport Sack models, this carrier backpack was designed under the close direction of veterinarians, dog trainers and outdoor product engineers to be ergonomic, safe and strong
  • 30 lb / 13 kg weight limit
  • K9 Sport Sack AIR Features:
    • Ventilated cooling side panels
    • Over 5 different safety/failsafe features
    • Adjustable dual side pockets
    • Sternum strap avalanche whistle clip
    • Moisture wicking, ventilated shoulder straps


  • Please refer to sizing guide image
  • In between sizes? If you are wider and shorter, size up and get a booster block.
    • For example, Humphrey (18 lb, small French bulldog) can fit a size Small for length AND a size Medium in terms of width and weight. In this case, we prefer to size up to a Medium which is wider, and add the booster block for optimal comfort
  • X-Small: 10" - 13" from collar to rear in "begging position"

  • Small: 14" - 17" from collar to rear in "begging position"

  • Medium: 17" - 20" from collar to rear in "begging position"

  • Large: 20" - 23" from collar to rear in "begging position"

Tutorial: How to Measure Your Dog for the K9 Sport Sack

    Tutorial: How to Get Your Dog into the K9 Sport Sack