Kolossus | Big Dog Carrier & Backpacking Pack

Completely redesigned in appearance, construction, and functionality, the Kolossus Backpack Dog Carrier is the most advanced solution for carrying medium to large dogs weighing 20–80 lbs (9–36 kg). Built for serious adventure, it’s the only carrier that doubles as a full backpacking pack when your dog isn’t inside.

Available in sizes L–XXL, the Kolossus features top-of-the-line safety and comfort technology for both dog and human. Its adjustable shoulder and torso sizing ensures a secure, ergonomic fit for a wide range of body types—making it more versatile and comfortable than ever (as long as you can handle the weight).

When not carrying your four-legged companion, the Kolossus easily converts into a 50–60 liter backpack, allowing you to carry your gear for long hikes, bike rides, and public transit. Rugged, adaptable, and adventure-ready, this backpack is built for the most demanding outdoor experiences.

FEATURES & DETAILS
• Backpack dog carrier for medium to large dogs (20–80 lbs)
• Available in sizes L–XXL
• Converts into a backpacking pack when not carrying a dog
• 50–60 liter gear capacity
• Adjustable shoulder and torso sizing for ergonomic fit
• Designed for strenuous hikes, bike rides, and public transit
• Heavy-duty construction for long-term use
• Built for serious outdoor adventures

DOG WEIGHT RANGE
20–80 lbs (9–36 kg)

BACKPACK CAPACITY
50–60 liters

RECOMMENDED USE
• Long and strenuous hikes
• Backpacking trips
• Bike rides
• Public transportation
• Outdoor and adventure travel

SAFETY & DESIGN
All K9 Sport Sack carriers are developed under the close guidance of animal professionals, veterinarians, dog trainers, and outdoor product engineers to ensure each carrier is ergonomic, safe, durable, and built for real-world use.

CARE INSTRUCTIONS
Spot clean as needed
Air dry completely
Do not machine dry