This is the Arc'teryx Proton. I purchased it at an outdoor shop in Fukuyama City. Actual measurements: Width: 59 cm Length: 71 cm Quoting from Namche Bazar: Photos 18 and 19 It's made of stretchy material. Proton Lightweight Hoody Men's A lightweight hoody that combines breathability and insulation. Ideal for high-output activities in cold environments. *The Proton Lightweight Hoody is the new name for the Proton FL Hoody. The versatile Proton is perfect for climbing, boasting durability, and light on the trails, it can be worn alone or as a mid-layer. It excels in breathability and temperature regulation, maintaining comfort even when the temperature or activity level changes. Octa Loft knit insulation provides warmth while also controlling moisture and ensuring breathability for lasting comfort. The abrasion-resistant Fortius Air 20 material is stretchy and wind-resistant, while also maintaining the appropriate temperature inside the garment due to its breathability. The zippered chest pocket can store small items, and the three-dimensional design enhances freedom of movement. The insulated, thin hood fits comfortably under a helmet. Updated with an improved fit. Technical Features Breathable Air permeable Light wind resistance Construction Octa® Loft has a clean finish, protecting heat with breathable insulation while maintaining a microclimate Fortius™ Air 20 material balances breathability, weather resistance, lightness, and durability Design & Fit Trim fit with athletic performance Patterning Articulated elbows Gusseted underarms Fabric Treatment DWR (Durable Water Repellent) finish repels water Pocket Construction Two stretch-woven zippered chest pockets Two zippered handwarmer pockets Zippers & Fly Construction No Slip Zip™ front zipper Hood Configuration Helmet compatible Adjustable insulated hood Hem Configuration Adjustable hem drawcord