Information:Available in two sizes for a better fit and created from our popular PosiCharge Competitor Tee fabric. Two-ply 100% polyester interlock with PosiCharge technology Inner non-woven interfacing Self-binding ear loops with unique, easy-to-adjust sliders S/M for ages 4¿7, M/L for ages 8¿12 500 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 FDA cleared or approved.