Materials Upper: 8oz 100% flax linen fabric. Lining: Undyed 100% cotton twill fabric. Laces: 100% cotton herringbone laces. Heel: 90mm, made from natural wooden chips and wrapped in 100% authentic and biodegradable jute. Outsole: Undyed rubber made from 68% naturally derived sources. Heel Counter: 100% cotton, handmade in Spain. Sock Lining: 100% flax linen. Eyelets: Antique brass Heel Height: 3.5 in / 90 mm