Technical Climbing / Ice Climbing / High-altitude Trekking Material: HEIQ XREFLEX / APEXHEAT / 100% Nylon Active insulation jacket designed for technical climbing and high-altitude trekking. Core zones use APEXHEAT antibacterial and deodorizing insulation (80g/?) combined with HEIQ heat-reflective technology to enhance the jacket's warmth and wind resistance, maintaining warmth when wet and ensure dry, warm comfort during exercise. Abrasion-resistant, warm, and breathable zoned design, compatible with equipment, solves scraping and abrasion issues during technical climbing and heavy-load trekking, easily handling complex outdoor environments. Professional athletic fit design significantly enhances lightness and flexibility during exercise. Patented Standing Brim Wind Hood / Enhanced wind and rain protection, reducing the impact of wind, rain, and snow One-Piece Collar Design / Reduces collar bunching and pulling for greater comfort Napoleon Zipper Chest Pocket / Secure storage that prevents items from slipping out Underarm High-Sweat Zone Stretch Breathable Mesh Panel / Helps rapid heat dissipation, enhances arm mobility, and provides greater athletic comfort Back Heat Dissipation Zone / Inverted T-shaped breathability system quickly evaporates sweat, maintaining effective heat dissipation during exercise 3D Articulated Sleeves / 15-degree pre-bent elbow design conforms to arm movement Asymmetric Cuffs / Elastic cuffs for easy layering and glove compatibility Underarm One-Piece Cut / Full freedom of movement Fit: Athletic