Available in two sizes for a better fit and created from our popular Posi Charge Competitor Tee fabric. Two-ply 100% polyester interlock with Posi Charge technology Inner non-woven interfacing Self-binding ear loops with unique easy-to-adjust sliders S/ M for ages 47 M/ L for ages 812500 units per case (100 inner poly bags with 5 units each = 500) Non-returnable Not a toy Not intended for children under age 4 Use under adult supervision only This product is not intended for use by health care professionals and is not intended as a replacement for personal protective equipment. This product makes no claims of antimicrobial protection antiviral protection particulate filtration or infection prevention or reduction. This product has not been F D A cleared or approved.