The Micro Jacket is a damn near perfect piece that fits into the modern layering model of outdoor clothing. Light enough to be worn as an efficient insulating mid layer for all cool weather activities it also works brilliantly as a lightweight & cosy outer jacket. The Polartec Classic Micro 100M is the lightest weight fleece fabric that Polartec manufacture & is proven to last longer & is more durable than your run of the mill” fleece. Please excuse the slightly shonky image, but the one M.E provided was just plain wrong. Flatlocked seams reduce bulk & improve next-to-skin comfort & just like most synthetics it wicks moisture incredibly well & dries pretty fast too. Polartec Classic Micro 100M Light, warm & quick drying Flatlocked seams for enhanced next-to-skin comfort YKK reversed front zip Contrast zip pulls 2 zipper hand warming pockets For the kit geeks, below are links to M.E.s Technologies Page that has a bit more info on fabrics & construction. Polartec Classic Micro