Norrona Senja Aero 90 Vest - Men's Golden Lime/Snow White S. This wind resistant vest is developed for trail running but will work great for all outdoor activities where you need wind protection in the front and breathability in the back. They use a arero90 fabric in the vest because it offers a great mix of wind resistance breathability packability and durability. They use an open mesh fabric in the back for breathability and fit. The main fabric is 100percent recycled 20d nylon 49g/m2. The open mesh is made of 86percent recycled nylon /14percent elastane with the weight of 145g/m2. Main features include: elasticated arm holes for a good fit brushed interior fabric inside neck reflective stripes and logos chest pocket zippered back pocket with a concealed belt. When turned inside out the pocket becomes a pack to store the jacket in and attach around your waist when not in use. This vest has a slim fit that is slightly longer in the back. Specifications for Norrona Senja Aero 90 Vest - Men's: Manufacturer: Norrona Age Group: Adults Application: Outdoor Gender: Male Apparel Fit: Regular Lining Material: No Lining Insulation: Not Insulated Sleeve Length: Sleeveless Features of Norrona Senja Aero 90 Vest - Men's Asymmetric longer back cut Back ventilation Black reflex logo Center back reflex Chest pocket with zipper closure Elasticated sleeve-hole Exterior hangloop High protective collar Packable in pocket Printed neck/back label Reflective safety logo Soft material inside collar Wind resistant fabric in front and shoulders YKK front zipper 4mm Zippered back pocket Package Contents: Norrona Senja Aero 90 Vest - Men's Norrona 5819-23-5567-S: Senja Aero 90 Vest - Men's Golden Lime/Snow White