Man with a backpack carrying a dog on his shoulders against a white background -K9 Sport Sack.
Man with a backpack carrying a dog on his shoulders against a white background -K9 Sport Sack.
Gray and black backpack with multiple straps on a white background -K9 Sport Sack.
Black and gray backpack with multiple straps on a white background -K9 Sport Sack.
Gray hiking backpack with multiple straps on a white background -K9 Sport Sack.
Gray hiking backpack with straps on a white background -K9 Sport Sack.
Man with a backpack carrying a dog on his shoulders against a white background -K9 Sport Sack.
Woman holding a fluffy dog over her shoulder with a green backpack on a white background -K9 Sport Sack.
Man with a backpack carrying a dog on his shoulders against a white background -K9 Sport Sack.
Woman holding a fluffy dog over her shoulder with a green backpack on a white background -K9 Sport Sack.
Man with a backpack carrying a dog on his shoulders against a white background -K9 Sport Sack.
Woman holding a fluffy dog over her shoulder with a green backpack on a white background -K9 Sport Sack.

K9 Sport Sack Kolossus Big Dog Carrier & Backpacking Pack

Regular price $264.95
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Only 49 items in stock!

Explore the K9 Sport Sack Kolossus

  • DOG CARRIER + HIKING PACK - When you’re not carrying your four-legged friend, Kolossus doubles as a professional-grade hiking pack with 60L of storage. Whether you're heading into the wild or taking on city streets, you’ll be ready for adventure!
  • FIND THE RIGHT SIZE - The X-Large is best for dogs with a length of 23-25” from collar to the base of the tail. Typical dog breeds that will fit this size backpack include Doberman, Golden Retriever, Husky, Boxer, Standard Poodle & Vizsla.
  • MAXIMUM COMFORT - This backpack carrier is engineered for ultimate comfort, with adjustable shoulder and torso sizing to match any body type, an internal aluminum frame for support, a padded back panel, and a padded waist belt.
  • AMPLE STORAGE - Kolossus features a removable storage bag, two side pockets for water bottles, a large pocket at the base & a waste bag dispenser in the hip belt. Gear loops on the bottom of the carrier can be used to attach additional loose items.
  • MADE TO LAST - Thanks to premium materials and advanced construction, our design is built for long-term, rugged use—so you and your pup can enjoy it for years to come!


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.


Perfect for Big Dogs

The K9 Sport Sack Kolossus is designed specifically for larger dogs. It holds pets up to 80 pounds comfortably, allowing you to take your furry friend on all your adventures. With its spacious design, your dog will have room to sit, stand, or lie down, making it a versatile carrier for hikes, camping, or everyday walks.

Fully Adjustable for Comfort

One of the standout features of the K9 Sport Sack is its fully adjustable straps. You can customize the fit for yourself and your pet, ensuring maximum comfort and security during your outings. The adjustable design means it fits various body types, and you can have peace of mind knowing your dog is secure as you traverse rocky trails or stroll through parks.

Multi-functional Outdoor Gear

More than just a pet carrier, the K9 Sport Sack Kolossus doubles as a professional-grade hiking pack with a capacity of 60L. It features multiple compartments for gear, snacks, and water, allowing you to bring everything you need for a day outside. This multifunctionality makes it an exceptional choice for outdoor lovers who want to include their pets in their adventures.


Free Standard Shipping automatically applies to your qualifying minimum online purchase subtotal of $35. No promotion code necessary. Subtotal refers to amount of order before taxes and shipping

Processing Time: All orders are processed within 1 to 2 business days (excluding weekends and holidays) after receiving your order confirmation email. You will receive another notification when your order has shipped.

Shipping Time: Orders placed from the U.S. are typically delivered within 2-7 business days from the date the product is shipped out.

Click here to learn more about our shipping policy.

Unhappy with your product? We'll take it back!

Returns are accepted within 30 days of delivery with free return shipping, no restocking fees, and refunds processed within 5 business days.

We take pride in selling only the highest quality pet products and have confidence that you will be 100% SATISFIED with everything you buy from us. Customer satisfaction is our top priority.
Click here to learn more about our Return policy.


However, if you don't have a positive experience for any reason, just let us know and we'll make things right by offering you a replacement or refund within 30 days of delivery. Buying from us is 100% RISK-FREE with our 30 DAY MONEY-BACK GUARANTEE. click here to learn more about our refund policy.

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