Shoulders and upper back: where the pack sits
Carry a heavy pack all day and the straps pill, thin and eventually rub through an ordinary fleece. Here the shoulders and upper back are stretch nylon, far harder-wearing than fleece, and it stretches so you never feel it.
“I’ve been hiking for about five days with a 45-pound backpack. Super comfortable, and I don’t have to worry about it peeling or making marks on my fleece.”Luke, on the Yukon trek






