The AIR PLUS is a pet carrier built by you!  The design is based on years of research and feedback from thousands of loyal customers.  With additional storage, padding and ventilation the AIR PLUS is built for intermediate hikes, bike rides or any moderate outing you can dream up.  Like all K9 Sport Sack models, it was designed under the close direction of veterinarians, dog trainers and outdoor product engineers to be ergonomic, safe, and strong.  40 LB/18 KG weight limit.

Small: 14-17 inches from collar to floor in begging position and up to 20 lbs* 

Medium: 17-20 inches from collar to floor in begging position and up to 30 lbs* 

Large: 20-23 inches from collar to floor in begging position and up to 40 lbs*

* Weight may vary from dog to dog and are only included here as a supplementary metric to assist in correct sizing.  Please measure your dog first and use the weight as a secondary consideration.