This is a used Arcteryx Alpha AR Gore-tex Pro Jacket Blue Womens Size M.  RRP £600

It is in very good condition with a little wear.  Arcteryx gear is really long lasting, so this would still make a good used buy.  

SV is the most rugged, most protective design from Arcteryx.  The most durable Gore-tex Pro is used in a longer cut jacket for the best weather protection.  This is a great jacket for serious days out in the mountains.  

Features:  

Articulated elbows

Helmet compatible storm hood

Laminated brim

Waterproof external zippers

Pit zippers for easy venting

Die-cut Velcro cuff adjusters

Laminated hem

Drop back hem

Adjustable hem drawcord

Chest pockets with zipper slider

Internal zippered security pocket

Two high-volume hand pockets with zipper sliders

Size guide is in the pictures.  There is some wear to the lining at the back of the neck and around the collar.  There is some minor wear around the collar and cuffs.  There are some marks at the lining on the hem and pocket.  This wear is all visible in the photos, so please check you are comfortable with this condition before bidding.