Designs create a plump appearance in two main ways: internal stuffing or foam backing that pads the garment, or a built-in inflatable chub suit that uses a battery-powered fan to inflate the costume.
Sets commonly include a jumpsuit or bodysuit plus a headpiece, mitts or gloves, and shoe covers. Some character sets may also include decorative accessories such as plastic-bead necklaces or other themed items.
Manufacturers use zippers for the main garment, hook-and-loop chin fasteners for headpieces, and attached foam mitts or slide-on gloves for hands. Shoe covers are held in place with elastic bands or rib-knit cuffs, while the jumpsuit itself may be foam-backed or stuffed to maintain the plump shape.
Character plump costumes often include themed accessories such as oversized mitts, shoe covers, and character headpieces. Some sets also add decorative items like plastic-bead or character-themed necklaces.
Most plump and inflatable costume listings are targeted at adults. One inflatable listing specifically notes an age grade of 15 years and older.
