Woollen flannel, less twisted than worsted flannels maintaing the brushed feel to the cloth. Although not officially heavy in weight we have included this in the heavy weight category because the cloth will be warm to wear.FOX BROS Fox Brothers have produced woollen and worsted fabric in Wellington Somerset for nearly 250 years. Somerset w3as another highly important wool centre. The company is officially credited as the original creators of Flannel cloth. Sublime is always the word that comes to mind with their fabrics.