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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 to accommodate your pet and its tail
  • 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

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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 314 reviews
My dog and I love this backpack!

My dog and I love hiking together but he recently lost the use of his back legs. I was so excited to find this backpack and since receiving it we have been able to resume our hikes. He's happy to be put inside of it and he likes that it is facing me, rather than facing outward. The backpack is super well-made, comfortable and easy to put on. I love that there are slits for his paws, and the zipper is so sturdy that on really warm days I can keep it unzipped a bit.
I had to call the company because of a mix up on my order and the person who answered the phone was so friendly and helpful and even went out to the warehouse to fix the issue himself, then called me back to confirm. I was blown away by the customer service.
I would definitely recommend this product and this company!


We have a 20 lb chug who is exactly 20 inches along her back. a medium would have fit perfectly. We got a large though because we take her places in winter and wanted the option to shove blankets with hand warmers at the bottom. The large works fine. We put a yoga block at the bottom to prop her up when there aren't blankets in there. She loves to go fishing with us and this allows us to take her when before it would have been too dangerous.

Deborah Nielsen
wonderful product+Wonderful service=great experience

I have nothing to say but this is a wonderful company with a outstanding product. I ordered a x small pack but was accidentally sent a small. I was bummed as we were set to go camping over the weekend. I texted the number provided to see what could be done. They shipped out the pack that day and I got it in time for the trip!! The pack is perfect and is comfortable for both of us. Being a tiny girl- she can't keep up with the german shepherd siblings on a hike. This makes it easy for all of us and she enjoys the view from the pack. Again- BEST company to work with!

Best purchase EVER

I was a little hesitant buying this, since our old pup never liked any carriers whatsoever. We bike A LOT, and biking is the fastest and best way to get around in Malmö, so it was definitively a problem that he couldn't go with us by bike. I was recommended this bag by another dog owner, and I took the chance. So extremely happy I did! It only took him a few minutes to understand it - and then we both were in love. Now he jumps with joy when I bring out his sport sack! On the bike he has the most satisfied look ever, enjoying the wind in his gray hairs. Not only has this bag made our life more easy and enjoyable, people love seeing him ride with us! A huge plus was that it arrived so quickly and customer service were very easy to deal with.

Megan Burke
Sulley’s got a new ride

When you have a little dog & a senior to boot it can be hard for him to keep up on our Adventures. But now he can literally go anywhere. We had purchased 2 from amazon & they were both terrible. This bag is so well made & you can even get a patch with your pets name so everyone knows who you are carrying around on your back 😜 We have a 16lb. Miniature dachshund & the small fits him so perfect. He was really hesitant at first, giving us looks like “why are you stuffing me in a bag” but after he got settled & realized he doesn’t have to hike for long he really sat back & enjoyed the ride. I highly recommend this bag & it might be a little more expensive than most but this bag is made to last & you won’t regret it.