This is two layers of a colorful striped heart 100% cotton fabric with an opening to insert a filter or other mask if you want. Has a wire sewn in to shape it around the bridge of your nose. Toddler size is about 7 1/2 inches long, 3 inches wide folded, but opens to 6 inches wide. Youth size is about 8 1/2 inches long, 4 inches wide folded but opens to 7 inches wide. Has thin elastic that knot can be adjusted on to make fit snug. Machine washable and dryable (05230)