All use bags while going outside so, that it would be cofortable to carry anything within them.
so, to buy a bag here are some tips
select a bag that are comfortable to carry your things
select a bag with pockets so, thatit woulld be convinent to keep money in them.
check wheather the stritching is perfect or not
check the material thickness that can hold things without tearing.
select waterproof bags for rainy season.