Shoulder straps aren't necessarily more comfortable the wider they are; rather, the optimal weight distribution depends on the golden angle between the point of contact with the collarbone and the upper edge of the trapezius muscle-typically between 18° and 25°. An angle that's too small will cause the strap to slip, while an angle that's too large will compress the acromion, leading to compensatory tension in the soft tissues over time. Professional packaging accessory designs fine-tune this angle through details such as weave density gradients, leather lining thickness zones, and axial offset of metal buckles.
After switching to this woven shoulder strap for my commute last week, the soreness in my left shoulder has significantly decreased. It doesn't slip down as easily as before when I walk, and it doesn't dig painfully into my collarbone. The canvas itself is lightweight, but the shoulder strap uses an elastic blend weave with leather edging, so it's not stiff when stretched and extends slightly with the body when bending over to pick things up.
