Listings show suggested ages and rough dimensions — ages range from "3 Years and Up" to "15 Years and Up", some provide dimensions (for example 11"×9.5" and 15"×14") and a few list a maximum head size (about 24 inches).
Common features include soft outer fabrics (plush faux fur or silk), embroidered cat designs, padded or contoured shapes for improved light blocking, and elastic straps for a secure fit.
Care guidance for cloth (cotton) face masks is typically to hand wash or machine wash in cold water.
Attachments vary by mask: cotton face masks use nylon ear loops, plush sleep masks use satin elastic bands, and some silk sleep masks use adjustable elastic straps with a buckle.
Sleep masks are described with light-blocking features such as contoured shapes, soft padded interiors, and full-coverage designs intended to reduce light exposure.
Kits include paperboard cat face cutouts plus decorative components such as glitter eyes, loops, and whiskers for assembling and decorating the masks.