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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 (Excludes klearance and custom items). Learn more about our policy here.

Customer Reviews

Based on 276 reviews
Happy Bella

Our long haired chihuahua is getting older and still loves to hike with us. Sometimes we hike a little too far for her, the K9 backpack is perfect and she loves it! I also purchased K9 name patch ( Bella ), collapsible sport saucer and booster block.

Very good quality!

Love this and I purchased because another individual bought one before me I was skeptical but they were spot on, highly recommended, worth the $

Mini Schnauzer loves her bike rides

Very comfortable, little bit of work getting Miss Lottie in but once she is so cute and everyone smiles back at you when they see her coming :D.... So glad we got it.


I love this bag and so does my 13 year old Maltese. I ordered too big the first time and the customer service team made it painless to exchange. Great product and excellent service!
Get a custom patch—it’s worth it!

Love it one year into use!

I’ve had this bag over a year now and wanted to leave another review. My dog had jumped out of a regular backpack while bike riding which inspired me to give this a try. It has been nearly perfect. She’s a long bodied Maltese but I went with the XS. It fits well but sometimes it is too big and I intend to make her a little cushion to help keep her head up when she relaxes. We go on walks and hikes and bike rides and she’s fairly comfortable. She takes some wrestling to get into the bag but she always wags her tail when I pull it out because she knows she doesn’t have to walk! She’s 10 years old with short legs and just can’t keep up with me. In winter there’s room for her sweater inside. Recently one of chest clip pieces got stepped on and broke and the company immediately shipped me out a replacement. I really appreciate the customer service and the product!