This is the older model of our fab Long Rib Booties, and is only available in 'Charmer' size. The booties have long stretchy double rib to hold the bootie on and cover any gaping at the ankles, and a merino wool fleece inner with micro fibre shell. All seams are embedded between the layers. Please be aware that the fleece inner is designed to shrink on first washing to match up snugly with the microfibre outer.