adjustable instep strap for a comfy, customizable fit. Its classic design pairs perfectly with casual or formal wear, making it a versatile option for any occasion. Dress it up for a night out or wear it to the office - the Mary-Jane's fashion and function blend seamlessly. Square-toe Flat 1cm/0.34'' heel AdaptAll Strap™ Knit upper made from plastic bottles Natural Artemisia Argyi herbal insole Rubber outsole Packaged with 90% recycled and 100% recyclable cardboard Note: The insole contains natural Artemisia Argyi herbal. People with allergies, please consult a medical professional before wearing.Because we use durable upcycled materials in a strong knitted design, our machine-washable shoes or bags can fully withstand a cleaning cycle in the washer or a quick hand washing. As for not-machine-washable shoes, we recommend gently scrubbing the uppers and soles with a clean cloth outside and inside. Item #10806455