Fjallraven Signi Overshirt in like-new condition. Brand description: Our first heavy flannel overshirt for women is ready to take on any cool day outdoors. Made from 100% organic cotton, it can be worn either as a shirt or as a standalone jacket over a sweater. The relaxed fit allows for plenty of layering underneath. A classic and hardwearing flannel overshirt that will keep you warm and cosy on cooler days.