Mountaineering / Hiking Material: APEXHEAT / 100% Nylon Active insulation jacket designed for mid-to-low altitude mountaineering and winter hiking. Core zones filled with APEXHEAT antibacterial and deodorizing insulation (80g/?), meeting the warmth needs of lightweight hiking and mountain activities to maintain warmth when wet and ensure dry, warm comfort during exercise. Water-repellent and stain-resistant fabric technology withstands light rain, resists dirt, and is durable and easy to care for. High-performance athletic zoned design helps rapid heat dissipation, accelerates sweat wicking, and provides breathable comfort. Patented Standing Brim Wind Hood / Enhanced wind and rain protection, reducing the impact of wind, rain, and snow One-Piece Collar Design / No collar seam at clavicle, more comfortable for layering Underarm One-Piece Cut / Full freedom of movement Back Elastic Breathable Panel / Ventilation and heat dissipation in high-sweat zones, unfazed by sweat during exercise, comfortable to wear Side Abrasion-Resistant Panel / Reduced fabric friction, more durable garment 3D Articulated Sleeves / 15-degree pre-bent elbow design conforms to arm movement Asymmetric Cuffs / Elastic cuffs for easy layering and glove compatibility Quick-Adjust Hem / Prevents wind infiltration, and offers more warmth Fit: Regular