Whatever you select to carry will have both weight and volume (or bulk). Equipment for adventuring is necessary, but too much is deadly. In order to be able to move with reasonable rapidity and freedom, the number of items carried and apparel worn must suit encumbrance restrictions. (Remember that the volume of something can be as critical as its weight, i.e. 20 pounds of feathers in a sack are cumbersome.) To be useful, items generally must be readily accessible, so this consideration must also be borne in mind. Lastly, as the main purpose of adventuring is to bring back treasure, provision for carrying out a considerable amount of material must also be made.