Most mini mystery plushies use polyester plush for the body; some items also include plastic or PVC components alongside the polyester.
Care instructions vary: many listings are labeled surface‑washable or spot‑clean only. Wash‑to‑reveal toys specifically instruct washing, drying, and gentle grooming after the reveal.
Reviewers consistently praise the design and cuteness, often noting strong child appeal and gift suitability; several reviews describe the materials as soft and of good quality.
Reveal methods include blind packaging or capsule/egg‑style unboxing, peel‑off reveal panels, and a wash‑to‑reveal process that requires washing, drying, and grooming.