Provided are mesh underpants and a method of putting on same, whereby soiling due to nighttime leakage is inhibited even if the wearer is unused to wearing an absorbent pad. The provided mesh underpants have a waist opening and a pair of leg openings and can be attached to the outside surface of a roughly-rectangular absorbent pad. When worn outside a disposable diaper that is worn so as to cover the outside surface of the absorbent pad, the provided mesh underpants can cover roughly the entire length of the disposable diaper.