Send them to school with a face mask they won't find irritating or uncomfortable. Designed to tie behind the head, the Backcountry Kids' Face Mask offers an adjustable alternative to masks with irksome ear loops. Its double-layered construction features a slot for a filter, and includes a pair of PM2.5 activated carbon filters that help block micron-level particles. And while we don't recommend they head to P.E. with the mask equipped, it's a great option for the classroom.