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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.

For Dogs Ranging 4-30 lbs (2-13 kgs)

dog Sizing chart,


  • 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.

Customer Reviews

Based on 362 reviews
Great product

Walking on the beach, riding on the bike or waverunner, Osborne loves being able to enjoy the activities with me and I’m thrilled to be able to take him. We get so many compliments and people wanting to take our pic. Sturdy product, very secure and he has no problem getting in tho the first couple times were not as easy. There is a little learning curve but he quickly figured out whenever he gets in, fun awaits. O is 14 lbs and I shdve gotten the medium instead of large but I just roll up a sweatshirt and stuff it in first so he sits on it. Problem solved. Shoulder straps are comfy for me too. I did a lot of research before buying and K9 is the best out there by far.

Pup loves it

It took our mini labradoodle a few times to get used to being put in to the carrier but now that she associates it with bike riding it’s easier to get her suited up. She loves to go biking and not being left behind. We love taking her!

Melody Paxton
Love our backpack on bike rides!

I like the ease of this pack. Lyric gets in and out without worry. The wide zipper flap keeps her fur out of the zipper and she gets quickly onto our back for a fun bike ride!

Monica Tantalean
Everyone loves it!

I wasn’t sure how much time it would take my dogs to get used to being confined as they’re both older and one typically doesn’t like to be held. However I was pleasantly surprised by how easy it was to get them settled in and they loved it once we started biking! I used lots of treats during the initial introduction and now every time I take the bag out they get excited 😆 I can’t wait to use it more this summer for all our outdoor adventures!

Jesie Southern

I’ve been eyeing the Air 2 for some time now. I decided to buy it for our 6 month stay in Alaska because I can’t walk my boy, Cash, outside without fear of an eagle eating him. He is a 4 year old Chihuahua, 4 pounds and the XS with the booster is literally perfect. He was hesitant at first to get into the pack. Once he was in it though, I was so surprised. He was so comfortable! We walked 4 miles in town along with a couple boat rides the first day and he LOVED IT. He was close to his mom all day, so obviously it was a win-win. He fell asleep multiple times on my back and after letting him potty he jumped right back in. The only reason I am so shocked is because he is stuck to me like glue every day and I assumed he would trip out if he wasn’t being held in front. I was wrong. So so shocked and so excited to let him tag along on all the adventures the bigger pups get to go on. I highly recommend, so much so that I just bought another Air 2 for our 13 pound shelter mutt! Just buy one, you won’t regret it!! Thank you k9sportsack!