Completely redesigned in appearance, construction, and functionality, the Kolossus is THE big dog backpack carrier that now doubles as a backpacking pack. It is ideal for carrying medium to large dogs and is available in sizes L-XXL. Kolossus technology is top of the line in pet/human safety and comfort. Adjustable shoulder/torso sizing makes this backpack more suitable than ever for all body types (as long as you can withstand the weight). When you're not carrying your 4-legged friend, the backpack easily converts to carry your gear with up to 60 liters of space. Use this backpack for strenuous hikes, bike rides, and public transit.

For Dogs Ranging 20-80 lbs (9-36 kgs)50-60 liter capacity

Features

Safety

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.

The Trainer is an affordable, easy to use, entry-level backpack dog carrier. Available in sizes XS-L, it is ideal for smaller breeds, dogs that are still growing, training, and learning to socialize. Available in a variety of bright color options, the trainer should be used for short, non-strenuous activities like short walks, hikes, public transportation, and other similar activities. This carrier fits most comfortably? on dog owners with a small to medium build.

For Dogs Ranging 4-30 lbs (2-13 kgs)

Features

• Lumbar Support Strap (not included on size XS)
• Ventilated Side Panels
• Wide Base to accommodate your pet and its tail
• Side Water Bottle Pocket
• Padded Shoulder Straps
• Side Cinch Straps
• Unique color options

Safety

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.

The Trainer is an affordable, easy to use, entry-level backpack dog carrier. Available in sizes XS-L, it is ideal for smaller breeds, dogs that are still growing, training, and learning to socialize. Available in a variety of bright color options, the trainer should be used for short, non-strenuous activities like short walks, hikes, public transportation, and other similar activities. This carrier fits most comfortably? on dog owners with a small to medium build.

For Dogs Ranging 4-30 lbs (2-13 kgs)

Features

• Lumbar Support Strap (not included on size XS)
• Ventilated Side Panels
• Wide Base to accommodate your pet and its tail
• Side Water Bottle Pocket
• Padded Shoulder Straps
• Side Cinch Straps
• Unique color options

Safety

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.

The Plus 2 is a backpack dog carrier with a multi-functional storage pack. The storage pack is great for bringing gear, treats, or other necessities along on your adventures. It also acts as a support for your dog?EUR(TM)s back, pulling your pup in snuggly against your back. Available in sizes S-L, its thicker shoulder straps and padded back panel allow for more weight and strenuous activities. The Plus 2 is our most complete carrier for small to medium sized dogs and fits dog owners small to large in build.

For Dogs Ranging 8-40 lbs (4-18 kgs)

Features

• Detachable storage bag (14″x9″) Don’t forget your gear!
• Fully ventilated sides for maximum refreshing air flow
• Padded back panel for increased comfort and cooling
• Thicker, wider, pressure relieving shoulder straps
• Mesh dual side pockets for increased ventilation
• Ventilated cooling side panels
• Adjustable dual side pockets
• Sternum strap avalanche whistle clip
• Newly added PLUS 2 features include:
• Wide Base to accommodate your pet and its tail
• Adjustable Side and Back Cinch Straps to ensure the best fit
• Fur Flap (No more zipping your dog’s hair in the bag)
• Adjustable Collar Enclosure

Safety

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.