; Which exceptional breathability, the Proton LT Jacket is a crucial piece for midlayer wear during highly aerobic mountain hikes, backcountry expeditions, and ice and rock climbing. ; Trim Fit is a motion-friendly cut with reduced fabric for minimal bulk. ; LT: Light Weight blends highly effective tech with lightweight, minimalist cut. ; Fortius Air 40 softshell: • Abrasion-resistant softshell maintains high breathability. • Stretch weave for full range of motion. • DWR (durable water repellent) finish improves the water-resistant weave. • 71 g/m² fabric weight. ; Coreloft Continuous 65 insulation: • Continuous filament construction helps to eliminate cold spots and bunching caused by gaps in insulation bunching. • High degree of hydrophobic performance speeds the passage of moisture vapor from perspiration. • Synthetic insulation improves thermal retention while maintaining low bulk. • 2.0 oz/yd² / 65 g/m² fabric weight. ; Stand collar with zipper garage. ; Full-length zip with inner draft flap. ; No Slip Zip works like a series of speed bumps to prevent the front zip from self-opening. ; Long sleeves. ; Elastic paneled cuff for a snug, stretch fit. ; Zip chest pocket. ; Zip handwarmer pockets. ; Droptail hem with adjustable drawcord. ; Shell: 92% nylon, 8% elastane; Insulation: 90% polyester, 10% acrylic; Lining: 100% nylon. ; Machine wash and tumble dry. ; Imported. Measurements: ; Length: 30 in ; Product measurements were taken using size MD. Please note that measurements may vary by size.