
One carrier for the journey — backpack to under-seat travel bag.
The K9 Sport Sack Sky switches between hands-free backpack carrying and a horizontal pet carrier. Walk through the terminal with your dog close, then convert the pack for the next part of your trip.
Ready for travel, with comfort built in
- Two carrying modes: an upright dog backpack that converts into a horizontal carrier.
- Designed for airline travel: made to fit beneath many airline seats, subject to the airline’s rules and the size selected.
- Practical construction: durable 600D gridstop fabric, mesh ventilation and a plush base.
- Secure and organised: safety clips, an angled backpack base and two water-bottle pockets.
Choose your dog’s backpack size
Maximum dog weight: 13.6 kg (30 lb). This is the Sky model's capacity limit, subject to correct fit; it is not a weight-based size recommendation.
Check three things before choosing: weigh your dog; measure back length from the base of the collar to the base of the tail with your dog standing; and measure chest girth around the widest part of the chest, just behind the front legs. Use back length to choose your starting size, then check chest room and sitting height. Being below the weight limit does not guarantee a comfortable fit.
Between sizes or broad-chested? The manufacturer recommends sizing up where needed and using a suitable K9 Booster Block to achieve the correct sitting height. Ask us for help with your dog's back length, chest girth and weight before ordering if measurements fall between the ranges.
| Size | Dog back length |
|---|---|
| XS | 23–30 cm / 9–12 in |
| Small | 33–41 cm / 13–16 in |
| Medium | 43–48 cm / 17–19 in |
Measure from the base of the collar to the base of the tail. Also measure the widest chest girth and check sitting height. Contact us for help with measurements between the manufacturer’s published ranges.
External dimensions in horizontal carrier mode
| Size | Length × width × height | Empty carrier weight |
|---|---|---|
| XS | 45.7 × 25.4 × 25.4 cm (18 × 10 × 10 in) | Approx. 1.2 kg (2 lb 11 oz) |
| Small | 45.7 × 27.9 × 27.9 cm (18 × 11 × 11 in) | Approx. 1.4 kg (3 lb) |
| Medium | 50.8 × 27.9 × 27.9 cm (20 × 11 × 11 in) | Approx. 1.4 kg (3 lb 3 oz) |
These are the manufacturer’s external carrier dimensions, not internal usable space or dog measurements. Black is the available colour.
Watch: measuring and fitting your dog
Practise before travelling
Introduce both carrying modes gradually. Follow the supplied fitting instructions, check closures and security clips, and allow regular breaks. For upright backpack use, K9 Sport Sack recommends 30–45 minutes at a time. Plan the full journey around your dog’s comfort.