Outdoor Research MicroGravity Jacket - Men's Black Medium. You also need a shell that can breathe when youre working hard uphill. But the trick is you dont want to carry along the weight and bulk of two different jackets. Enter the Microgravity AscentShell Jacket: The solution to your crazy-weather yet crazy-exertion alpine adventures. With such stellar breathability and every feature youd need to be comfortable in the mountains youll never have to compromise on protection again. Since 2016 Outdoor Researchs proprietary AscentShell technology uses an electrospun process to create a 3L construction that breathes faster weighs less stretches more and far surpasses the comfort of traditional waterproof membranes. Learn more about the science behind our breathable waterproof AscentShell technology right here: https://www.outdoorresearch.com/blog/article/how-it-works-the-science-behind-breathable-waterproof-ascentshell-technology Specifications for Outdoor Research MicroGravity AscentShell Jacket - Men's: Manufacturer: Outdoor Research Apparel Fit: Trim Gender: Male Age Group: Adults Color: Black Application: Trail Fabric/Material: 100percent Nylon 20Dx45D Mechanical Stretch Ripstop w/100percent Polyester 30D Knit Backer Jacket Style: Active Pockets: Zip Chest and Hand Pockets Left Hand Pocket Doubles As Stuff Sack Features of Outdoor Research MicroGravity AscentShell Jacket - Men's Ascentshell 3L 100percent nylon 20D x 45D mechanical stretch ripstop with 100percent polyester 30D knit backer Waterproof Windproof Breathable Air Permeable Electrospun Membrane Movement-Mirroring Stretch Fully Seam-Taped Helment Compatible Halo-Hood with Hood Lock YKK AquaGuard Zippers Internal Front Stormflap Zip Chest and Hand Pockets Left Hand Pocket Doubles As Stuff Sack Carabiner Loop Key Clip Dynamic Reach Underarm Panels Elastic Drawcord Hem Hook / Loop Cuff Closure Trim Fit Package Contents: Outdoor Research MicroGravity AscentShell Jacket - Men's Outdoor Research 2743890001007: MicroGravity Jacket - Men's Black Medium Outdoor Research 2743890001008: MicroGravity Jacket - Men's Black Large Outdoor Research 2743890001006: MicroGravity Jacket - Men's Black Small Outdoor Research 2743890001009: MicroGravity Jacket - Men's Black Extra Large Outdoor Research 2743890001010: MicroGravity Jacket - Men's Black 2XL Outdoor Research 2743890001007: MicroGravity Jacket - Men's Black Medium