*Site and pricing for retailers only*
$4.45 $9.95
Sizing your dog for a K9 Sport Sack® isn't an exact science. If your dog is in between sizes, has a wide body but short in length, or is still growing, the Booster Block fits snuggly in the bottom of your K9 Sport Sack to boost your dog up 3." It helps make the K9 Sport Sack experience more comfortable for you and your dog.
+ XS/S are interchangeable between XS and S sized backpacks
+ M/L are interchangeable between M and L sized backpacks
+ XL backpacks require an XL Booster Block
+ XXL Bags require an XXL Booster Block
The K9 Promise
Every order helps animal and rescue shelters.
Worldwide Shipping
Because there are awesome dogs everywhere.
Veterinarian Approved
Safe, easy, comfortable, and fun!