As a kilt was traditionally manufactured without pockets for carrying such things as car keys or wallet, it is still worn with a type of pouch called a sporran, which is just the Gaelic word for pouch or purse. Sporrans are usually made from either brown or black leather.
Sporrans come in a very wide range of styles, from simple leather sporrans to those with fur fronts or fur-trimmed and faced with silver or some other metal. Often, the kilt wearer will choose a type of sporran depending on the occasion, with the more elaborate ones being considered suitable for evening wear and the others for casual or all-purpose wear.
The older style bag sporrans (often called "Rob Roy" sporrans) are also frequently seen as they tend to be a bit roomier than some of the more modern varieties. The long sporrans are called "military sporrans".
The sporran is typically suspended from a sporran belt which is a narrow belt (separate from the kilt belt) made of leather or chain. This sporran belt is sometimes run through a pair of small loops provided for that purpose on the back of the kilt. Occasionally the sporran is suspended from special leather belt loops which enable the sporran to be hung directly from the kilt belt. This is often done when a chain is used as the chain might otherwise chafe the kilt.
It is not unheard of for individuals to sew small pockets on the front of the kilt, underneath the apron, to keep necessities such as wallet or keys in.
Read more about this topic: Kilt Accessories