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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: 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 (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 292 reviews
Sean Cadden
Great for me chunky Cairn Terrier

This is the second Sport Sack I've owned. My Cairn terrier grew out of the small, necessitating the upgrade to the Medium. The new sack is terrific - I love the "flap" on the back zip (to avoid getting her fur caught in the zipper) and the padded shoulder straps. Overall its just a much better for for my "Smedium" 25 pound Cairn.

Great carrier!

I bought this carrier to take my dogs on hikes. I have a 29lb 10 year old pug mix and a 14lb 3 year old JRT mix and being small dogs, they usually have a hard time hiking for many hours. I was afraid it would not be sturdy enough to carry my 29lb dog, but I was wrong! The quality is great. I used the measurements on the K9 Sport Sack website and the carriers fit my dogs like a glove. I got the Medium for my pug mix and the Small for my smaller dog and they are both perfect. My small dog is a little skittish and afraid of it, but my older dog loves the carrier! The only downside is that now she only wants to go for walks in it! It is the cutest thing: she sees the carrier and then walks towards my back. If the carrier is on the floor, she climbs into it. I am very happy with this purchase!

Patrick kuykendall
Our dog loves to ride

Riding bikes has always been fun but having a way to take our dog has made it amazing.

Really like our bag !

We enjoyed every ride so far ! Perfect size and our dog as well ! Excellent!

Stacey Hartman

Pepper has always liked sticking close, so I figured the K9 Sport Sack would be perfect. And it was, she loves it. She's in the size large.

Living in AZ, it's hard having to leave the dogs inside during the day because of the hot pavement for 4-5 months of the year, but now we can take them along and keep their paws safe.