Ten more units of carrying capacity, and you keep it for good.

One grade of pockets is active at a time. Move up to a deeper grade whenever you like and you only pay the difference between the two.

Fifteen more units of carrying capacity, and you keep it for good.

One grade of pockets is active at a time. If you already hold a shallower grade, moving up to this one costs only the difference.

Twenty-five more units of carrying capacity, and you keep it for good.

The deepest grade there is. One grade is active at a time, and if you already hold a shallower pair you only pay the difference to get here.