Just bought a great backpack for a round the world trip, it's a Osprey Kestrel 68L (ospreypacks.com/en/product/mens/kestrel_68…), with the following dimensions 30" x 15" x 14" = 59" total (77cm x 39cm x 36cm = 152cm total). However, there are straps and buckles everywhere, I mean, it's a proper hiking-trekking backpack.
The dimensions are close to the maximum allowed check baggage restrictions for most airlines:
- weigh 50 pounds (23 kg) or less
- not exceed 62 inches (157 cm) when you total length + width + height
Do they count the straps or only the backpack's core body? I am quite scared as I never checked any piece of luggage before and I don't want to face an extra fee for that little.