Design: Lightweight and breathable eucalyptus tree fiber is responsibly sourced from FSC(R) Certified forests to provide a comfortable knit upper Shoelaces made from 100% post-consumer polyester thanks to recycled plastic bottles Perfect shoes for everyday wear in warmer weather Bio-based TPU eyelets In-Shoe Comfort: SweetFoam(R) midsole made with sugarcane-based green EVA for a contoured and bouncy step Castor bean oil and ZQ Merino wool combine for a cushioned, moisture wicking, and odor reducing insole foam ZQ merino wool heel lining provides comfort around your heel and ankles Additional Details : Care Instructions: Pull out laces and insoles, place in delicates bag (Pillowcase works) and machine wash on a gentle cycle with cold water and mild detergent; Set aside to air dry (Don't use dryer)