Quick answer: For a dog under 13.2 lbs, a sling is the best everyday carry: lightest (the Kangapooch weighs 6.6 oz / 187 g), fastest to use, and the only option that keeps the dog in contact with you. A soft-sided carrier bag is what you need for flights, because airlines require an enclosed under-seat carrier. A backpack carrier is for heavier dogs (13 to 25 lbs) and long hikes. A stroller is for senior dogs and multi-dog households on long outings. Most small-dog owners end up with a sling by the door and one of the others in the closet. Here is how to decide which.
The comparison at a glance
Dog sling. Weight: about 6.6 oz. Dog limit: 13.2 lbs (Kangapooch). Hands free: yes. Time to load the dog: 10 seconds. Flights: no. Best for: daily errands, transit, cafés, hot pavement, crowds, senior and recovering dogs on short outings.
Soft carrier bag. Weight: 2 to 4 lbs. Dog limit: typically 15 to 20 lbs. Hands free: no, unless worn as a shoulder bag. Time to load: 30 to 60 seconds with zips. Flights: yes, if it meets the airline's under-seat size. Best for: air travel, vet visits where the dog must be fully enclosed, hotels.
Backpack carrier. Weight: 2 to 5 lbs. Dog limit: 15 to 25 lbs depending on model. Hands free: yes. Time to load: 30 to 90 seconds, usually needs a second person or a surface. Flights: some models are airline-approved. Best for: hiking, biking, heavier small dogs, long walks where the dog tires.
Dog stroller. Weight: 10 to 25 lbs. Dog limit: 20 to 50 lbs. Hands free: no (you push). Time to load: 20 seconds plus unfolding. Flights: no; checked as luggage at best. Best for: senior or disabled dogs, two dogs, long outdoor days, shows and markets.
What each one is really for
Dog sling: the daily driver
A sling solves the ten-minute problems: the hot crosswalk, the crowded block, the train platform, the "dogs must be carried" shop, the big-dog encounter. Because it weighs almost nothing and folds into a tote, it is with you when those problems happen. The dog rides against your chest, which is why anxious dogs settle in it; in the largest survey of pet-dog behavior, 72.5% of dogs showed at least one anxiety-related behavior, with noise sensitivity (32%) and fearfulness (29%) the most common.
Limits: the weight ceiling is real (13.2 lbs for the Kangapooch, tested to 10,000 lift cycles at 10 lbs and a 24-hour static hold at 30 lbs), it is not enclosed enough for airline cabins, and it is not a car restraint.
Soft carrier bag: the flight ticket
If you fly, you need one. U.S. airlines require pets in the cabin to be in a carrier that fits under the seat; Delta's commonly cited soft-carrier size is about 18 x 11 x 11 in, and American Airlines caps pet plus carrier at a combined 20 lbs. Fees have climbed: Delta raised its domestic in-cabin pet fee to $150 each way for tickets issued from April 2025, and most major carriers now charge $125 to $150. Confirm dimensions with your airline for your specific aircraft.
Limits: 2 to 4 lbs empty, one hand always on the handle, zips to fight every time, and a dog that cannot see you.
Backpack carrier: the hiker
Backpacks spread weight across both shoulders and the hips, which makes 15 to 25 lbs manageable for a long day. They are the right call for a Standard Dachshund, a chunky Frenchie or a Cavalier who loves trails but fades at mile three. Limits: the dog is behind you, so you cannot see their face or feel them shift; loading usually takes a bench or a helper; and most are too bulky for a café chair.
Dog stroller: the senior's chariot
Strollers shine when the dog cannot walk far and you are out for hours: a 14-year-old Maltese at the farmers' market, a dog in post-surgery recovery, or two small dogs who need a break at different times. Limits: 10 to 25 lbs of frame, stairs and subway turnstiles are a problem, and in a crowd the dog is at knee level, which is exactly where you did not want them.
→ Find your Kangapooch size in 30 seconds
Decision guide: which one for your dog?
Dog under 13.2 lbs, city life, errands and transit: sling. Add a soft carrier only if you fly.
Dog under 13.2 lbs, you fly 2+ times a year: sling for daily use, airline-size soft carrier for flights.
Dog 13 to 25 lbs, you hike: backpack carrier. A sling is not safe above its limit.
Senior or mobility-limited dog, long days out: stroller for the long days, sling for the quick trips if under 13.2 lbs.
Two small dogs: one sling per person, or a stroller.
What to look for in a sling specifically
Since the sling is the one you will use most, here is what separates a good one from a photo prop:
Pouch, not hammock. The dog should sit or curl with chest and rear supported and the back level. A narrow V-shaped hammock folds the spine.
Two closures. Something that closes the pouch (the Kangapooch uses two safety lock buttons) and a separate clasp for the harness.
Sized to you. Six strap sizes (chest 28 to 52 in) instead of a buckle means the pouch sits high every time and there is nothing to slip. Use the Size Finder.
Washable and proven. 120 wash tests, a 5-year warranty.
Our earlier post on sling vs. carrier bag covers that pair in more detail.
Frequently asked questions
Can a sling be used on an airplane?
Not in the cabin as the pet carrier. Airlines require an enclosed carrier that fits under the seat. Many owners wear the sling through the airport and at the destination and keep the dog in the carrier for boarding and the flight.
Can I use a sling in the car?
No carrier that is worn on a person is a crash restraint. Use a crash-tested carrier or harness in the car and the sling once you arrive.
Is a backpack better for a dog's back than a sling?
For a dog under 13.2 lbs in a pouch-style sling with chest and rear supported, the posture is the same one vets recommend for carrying. A backpack is better simply because it is rated for heavier dogs. For a Dachshund, see our guide on carrying a Dachshund safely.
Is a sling a good gift?
Yes, and it is one of the easier ones to size: it goes by the giver's clothing size, not the dog's. Our 60-second measuring guide includes a gift-sizing table.
Bottom line
Carrier bags are for flights, backpacks are for heavier dogs and trails, strollers are for seniors and long days. For the 300 days a year that are none of those, a sling is the carrier that is actually with you. The Kangapooch has been that sling since 2009: crafted in Japan, vet-reviewed, backed by a 5-year warranty, shipped from Tokyo in 1 to 2 business days, arriving in the U.S. in 4 to 10 days with duties included. Size exchanges are free within 30 days.
