This stretch-knit ballet flat that has a weightless feel is designed with a low-pressure FreeFoam™ Comfort footbed for maximum contact and cushy arch support. Not only does it have antimicrobial and odor-control technology, but you can throw it in the washing machine for maximum freshness. Lightweight: puts cushioning and performance underfoot with an emphasis on streamlined comfort Treated with antimicrobial technology to keep you feeling fresh and dry Foam cushioning with arch support Machine washable Textile upper and lining/synthetic sole Imported Rise by BLOOM is an algae-blended resin containing algae biomass and bio-based additives, with renewable content of at least 45%, offsetting a significant portion of traditional EVA in footwear foams