baby astronaut

Many infant rompers are made from cotton, while costume or suit-style outfits are commonly polyester. Listings include both 100% cotton and 100% polyester options across different products.

Infant rompers often use lap-shoulder (envelope) necklines and snap closures at the crotch (three-snap or similar) to make on/off dressing quicker and easier.

Most rompers and many costumes are machine washable and many listings allow tumble drying. Some rompers recommend cold wash and tumble low and advise against ironing; a few costume items note sponge- or spot-clean only.

Costumes commonly include elastic at the wrists, waist, and ankles to improve comfort and fit. Listing notes also report many items fit true to size, and some helmets offer adjustable features.

Common decorative details include sewn patches and flag motifs, realistic-looking logos/patches, decorative zippers, and sculpted knee pads for a space-suit look.