At only 500g the Bergen is a great year round mountain walking jacket, balancing full protection with low weight and pack size. With additional storm proof features this is the jacket for use trekking and mountain walking where bad conditions can be expected. RAB Mens Bergen Jacket Features: 3 layer eVent storm fabric 2 sealed outer pockets with innovative drainage system 1 inner security pocket Internal and external storm flap over main zip Fully adjustable wire peak hood and retaining flap Lumbar draw cord hem drawcord and adjustable cuffs create storm proof seal Weight: 500g Colours: Blue, Black Sizes: S-XXL 3 layer eVent storm fabric Extremely breathable waterproof fabric. Patented waterproof membrane with a unique composition allows millions of tiny pores to breathe at their full potential. Sweat vents directly to the outside of the fabric in one easy step. Its called Direct Venting™ technology. eVent fabrics simply let the sweat out.