Story Built to be the most versatile layer in your closet, the Javelin takes lightweight performance to another level With a mission statement to “inspire people to live more adventurous lives through legendary products,” we knew we’d get along with Triple Aught Design’s tough, adventure-ready apparel that’s made to last a lifetime. Even better, it’s made here in the USA with every detail held to exacting standards. The Javelin employs a versatile combination of Polartec® materials for strategic insulation where you need it the most, making it a true four-season midlayer that won't let you down. Features Lightweight performance across changing climates and activity levels Strategic insulation in the torso, shoulders, bicep, and hood minimizes core heat loss Synthetic grid along back and arms provides maximum breathability and wicking performance Equally at home as a standalone insulator or paired with a shell Lightweight and compressible, easy to transport Sewn in the USA from USA-made materials Materials A powerful combination of Polartec's Alpha Insulation and Power Grid material to balance heat loss and prevent overheating during exertion Polartec® Alpha™ Insulation: Developed alongside US Special Forces and now adopted as their standard issue insulation, Alpha is an advanced, breathable insulation technology that works during both rest and dynamic exertion in the field Polartec® Power Grid™: Made with a unique grid construction that maximizes breathability and wicking. By utilizing it in areas frequently covered by load-bearing equipment, the Javelin provides warmth while minimizing sweat during cool weather activity Insulated Panels: 100% nylon Fill: 71% post-consumer recycled polyester/29% polyester Lining: 100% polyester Grid Panels: 93% polyester/7% elastane Sizing The Javelin has an active fit that's close to the body and true to size Take your normal size, or if you prefer a more relaxed fit consider choosing one size up For the absolute best personal fit, compare your body measurements to the chart below to help find the correct size Chest Neck Waist S 35 - 38 14 1/2 - 15 1/2 28 - 30 M 38 - 41 15 1/2 - 16 30 - 33 L 41 - 44 16 - 17 33 - 36 XL 44 - 48 17 - 17 1/2 36 - 40 All measurements are in inches.