Hermes Kelly Pocket 18 Belt Epsom Calfskin Kelly Buckle Permabrass Yellow Gold Noir H081120CC89

In black, the Kelly Pocket 18 stops being a summer novelty and becomes a piece you can wear to dinner. The Epsom calfskin strap, 0.71 of an inch wide, keeps its finish in the rain, and the pocket, 4.1 inches wide and 2.4 tall, disappears into the dark the way a pocket should.

I keep a key in mine and nothing else. That is enough: the whole reason for a belt pocket is the ninety seconds when you do not want to open a bag, and a key is the object that makes the ninety seconds matter.

The Kelly clasp is plated in yellow gold, which against black reads traditional rather than trendy, and the sliding adjustment covers 21.7 to 39.4 inches in one strap. At the waist with black trousers and a white shirt, it is formal; at the hips with black denim, it is not.

Honest notes: black leather shows scuffs more than chamois-tone leather does, and a full pocket can bulge if the belt is worn tight. Wear it a touch loose and the shape stays clean. Made in France.

A note on the black finish: it photographs as flat and formal, which is useful for evening, and it will not patina the way tan leather does, so expect it to stay as it arrived for a long time. Some people want exactly that; some miss the ageing. Wipe it after rain, keep the buckle away from perfume, and it will look the same in three years.