Castelli Flanders Long Sleeve Base Layer GWP

Castelli's Flanders Long Sleeve Base Layer may be its most sophisticated winter base layer to date. It features multiple fabrics placed strategically based on their insulating, wicking, and deforming qualities. The rib knit body insulates while evacuating moisture, the underarms are vented with mesh, and the sleeves maximize stretch to minimize restriction. Flatlock stitching eliminates chafing and keeps the fit snug so the various materials can do their job, and a mock turtleneck and elongated back extend coverage to keep the cold at bay.