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K9 Sport Sack FLEX Dog Carrier

K9 Sport Sack

K9 Sport Sack FLEX Dog Carrier


  • 3 Sizes in 1 bag
  • 50lb Weight Limit
  • New Waist Belt
  • Veterinarian Approved
  • Patent Pending

The K9 Sport Sack™ FLEX is the most up to date, upgraded, ultimate dog carrier backpack. With its FLEX 3-1 sizing technology, you can adjust your dog to get the perfect fit. Our team also added a waist belt to help distribute the weight of your dog and added extra comfortable shoulder straps to help out with the heavier load capabilities. The colors blue and green were chosen for their reflective purposes that will help you and your dog stay as cool as possible on your adventures. 

New K9 Sport Sack FLEX Features

  • Waist belt with pockets
  • Rear storage bag for extra gear
  • Adjustable sizing. 3 sizes in 1. Perfect for growing dogs or XL sizes.
  • Ventilated sides and side pockets allowing maximum air flow
  • Padded back side with structure bar for comfort
  • Upgraded shoulder straps and padding
  • Safety D-ring for collar hook-up
  • Dual side pockets
  • Elastic straps for water bladders or hanging supplies
  • Easy-pull SBS zippers
  • K9 Whistle Clip on sternum strap
  • Strong 20mm thick bottom rest pad to keep your dog comfortable
  • Light reflecting adjustable sternum strap
  • Velcro soft side for custom name tags, safety lights etc. on both the K9 Sport Sack and extra storage bag


from collar to floor in begging position

XSmall / Medium

up to 17 lbs maximum

XSmall: 10-13 inches

Small: 14-17 inches

Medium: 17-20 inches


Medium / XLarge

20-50 lbs

Medium: 17-20 inches

Large: 20-23 inches

XLarge: 23-26 inches

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