EXCLUSIVE AT NET-A-PORTER. Arch4's midi dress is spun from organic baby goat cashmere that's even softer than traditional fibers, as it's only produced once in an animal's lifetime. Designed just for us, this muted gray-green style has a subtle mock neck and floaty hem. Wear yours with chunky sandals and a clutch. This product was created using Considered Materials. Find out more about NET SUSTAIN here.