thanks for your review. it was useful for me choosing between matia v2 and patos. I chose patos because the lower end of the shoulder strap of matia v2 is a little bit lower than patos(about 2~3cm). so the patos' whole shoulder strap part which covers my armpit is shorter than that of matia v2. and it fits better for my short back length and armpit. i felt the whole stress of patos backpack is distributed better than that of matias for me.