Sling bag?
I think it IS OKAY
The possessive form for the singular noun backpack is backpack's.Example: My backpack's strap is broken.
A rucksack or (backpack, haversack, knapsack, packsack) is a bag carried by a strap on your back or shoulder.
Strap length. Distance from backpack center-of-mass to center-of-tread.
A waistbelt is a belt or strap worn around the waist, especially as part of a larger article such as a backpack.
It depends on what you want to measure: its length. width, thickness, strength, elasticity, resistance to abrasion. Since you have not bothered to provide that crucial bit of information, I cannot provide a more useful answer.
For a backpack baby carrier to be considered safe it should have strap on hip carriers with slings. It should also be certified and comply with guidelines by the "JPMA".
Dick Kelty made the first backpack in 1933 According to the United States Patent Office the first backpack was invented by Camille Poirier and patented (Patent No. 268,932) by him on Dec. 12, 1882. It was initially called the Pack-Strap and now referred to as the "Duluth Pack".
You call Vince using the cell phone (his number is on the shovel, 555-6789). When he goes away, get the Moonstone from his backpack.
one syllable
Boot Strap
The thing you write on that is on a backpack is called a name tag. Similar to a baggage tag/luggage tag except that a name tag is usually on the backpack from the time you bought the backpack.