The jacket utilizes the S.I.O. Engineer Pattern, designed to "fit like a second skin and never restrict movement." This silhouette is based on patterning technology cultivated through years of speed competition development, aiming to enhance comfort, mobility, and performance. By minimizing the number of component parts, essential seams are dramatically reduced, achieving both extreme lightweightness and enhanced ease of movement. Versatility is further strengthened by a seamless design focused on superior comfort, a stand collar construction to prevent cold air entry, and the Dual Vent function for regulating the internal garment environment. The premium material is a wool-based blend combining polyester's PU-free stretch and durability with wool's excellent deodorizing properties.

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