How do I measure my torso length?

To find the right size, your torso length is crucial. You can measure this at home yourself. To do this, locate the two measuring points on your back. When you tilt your head slightly forward toward your chest, you'll feel a vertebra protruding on your spine. That's your C7, the first measuring point. From here, measure the distance to the top edge of your hip bone. Using this length and the table provided above, you can determine the correct size of your ABS backpack.