Khaki Jumper Mini Dress. Looking good this autumn while remaining cosy and warm is important to any true fashionista, right? Well check out this khaki jumper mini dress from River Island. Made using at least 30% recycled polyester, this woollen mini dress is both stylish and warm for the months ahead. It’s knitted long sleeve design includes button down detailing and high neck finish. It’s combination of wool and recycled polyester makes it a sound sustainable fashion choice to get yourself noticed.