The Stormtech Boulder Thermal Shell Jacket merges premium insulation with dynamic design, engineered for professionals and outdoor enthusiasts seeking streamlined warmth across seasons. Built with high-loft synthetic thermal insulation combined with 97% polyester/3% spandex sleeves and side panels, this jacket provides exceptional heat retention with superior mobility. Performance technology is integrated throughout the construction. The high-loft synthetic insulation traps warm air efficiently whilst remaining lightweight and compactable, enabling easy packing for travel or convenient storage. The spandex construction in sleeves and side panels provides exceptional stretch and unrestricted arm movement, critical for sports and dynamic pursuits. The PFC-free DWR showerproof finish adds weather protection whilst eliminating harmful fluorinated chemicals, reflecting contemporary environmental standards. The breathable 1000g rating prevents moisture accumulation during activity, maintaining comfort and thermal efficiency across demanding conditions. Sophisticated design elements enhance both functionality and aesthetic appeal. The full-length zip with protective chin guard and inner zip guard prevents snagging and effectively seals out cold air. Two front zip pockets provide convenient storage for essentials. Open cuffs allow customised layering flexibility without restricting wrist movement, whilst a drawcord hem enables precise adjustment for optimal coverage and thermal retention. Branded tab on back neck, zip pulls, and right hem add professional finishing touches. This thermal shell jacket transitions effortlessly from urban environments to alpine expeditions, offering the technical sophistication and refined comfort that discerning users expect from premium outerwear. The combination of synthetic insulation, stretch construction, and weather protection makes it an essential piece for active lifestyles and variable weather conditions.