I took it on a mountain trip, but I only used it twice. Features: 【International Size】 This is a vest-type synthetic insulation jacket that keeps you warm while minimizing weight and thickness. The insulation material uses PrimaLoft Gold Active, which is highly breathable and stretchy, and resistant to getting wet. It's highly adaptable, allowing you to wear it continuously during any activity, both during movement and rest. Features 2: ● Keeps you warm without extra weight or bulk ● Breathable and stretchy insulation material PrimaLoft Gold Active ● Highly adaptable product that can be worn anywhere due to its stretch and breathability ● Two secure zip hand pockets, a security pocket on the left chest Size...M ● Item No.: OM8171 ● Material: Body: Lining: PERTEX QUANTAM AIRTM 20D Stretch Ripstop (59% Recycled Nylon, 41% Nylon) Insulation: Primaloft GOLD ACTIVE 60G/M2 (55% Recycled Polyester, 45% Polyester) ● Weight (approx.): 242g (size M) ● Sizes: S: Length 68.3cm Chest 102.9cm Shoulder Width 41.3cm M: Length 71.1cm Chest 109.2cm Shoulder Width 43.2cm L: Length 74cm Chest 116.8cm Shoulder Width 45.4cm