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K9 Sport Sack

K9 Sport Sack® Air 2


The Air 2 is the backpack dog carrier people know best. Available in sizes XS-L, it is a durable, breathable mid-level backpack perfect for smaller to medium size dogs. The Air 2 is offered at a reasonable price while including the essential safety and comfort features needed for a comfortable experience. This backpack is recommended for intermediate grade walks, hikes, public transportation, and bike rides. The Air 2 is constructed with durable Cordura® fabric and form-fitting mesh on the sides for breathability.

30 lb (13 kg) weight limit

  • Ventilated side panels for cooling
  • Adjustable dual side pockets
  • Sternum strap with avalanche whistle clip
  • Wide Base 
  • Updated Side Mesh
  • New Side and Back Cinch Straps
  • Updated Shoulder Strap Design (No More Popping Off Chest Clips) 
  • 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 250 reviews
Review After 1 Year of Use

I’ve had this backpack for a year — I am a 5’5” woman with an average build. My dog is a small terrier ~13lbs, and I purchased the small for him. He fits in it PERFECTLY! Absolutely loves it! However, I hate it after 10mins of use. It offers ZERO support for me, and my back starts to seriously ache. I honestly prefer putting my dog in my old school backpack because it has better support.

The straps on the Air 2 are too small and thin, and the chest band doesn’t do much to help — I wish there was a better option for the price. I won’t be buying one again unless a better version comes out at or around the same price.

Willy loves it!!

Willy is living is best life. He is frenchie as you can tell and he gets tired after a small walk. This is a must for these types of dogs . He loves it.

Perfect Pack !

My JRT turned 16 and I wanted to take her more places with me, especially after my second dog passed away. She is very fussy but took to this pack instantly. She’s very comfortable in it and loves to look around at her surroundings. Definitely worth the purchase!

Best way to bring my little guy EVERYWHERE!

My Maltese is only 6lbs and while he loves exploring, his little legs can only go so fast or so far. I’ve been able to bring him so many places in the sportsak (and get SO many comments everywhere we go). He loves that he is nice and secure and can see everything going on. He will even nap in it if he’s sleepy.

The only suggestion I would make is for the side pockets to be a little wider. When he’s in the XS sportsak, I can squeeze his leash and poop bags in one side and a small nylabone and a baggie of treats in the other. Would be helpful if they were water bottle size.

Overall awesome product and the customized patches make it even better!

Sports Sack Needs a Frame

I believe if the sack had an aluminum type of frame, it would help to place dog higher so they could see over my shoulder.