Smartwool Size Chart Surround yourself in 100% performance-driven, breathable, thermo-regulating Merino wool comfort. The Men's Merino 250 Base Layer One Piece was has everything: A close-fit hood, thumbholes, and even a fly and zippered drop tail for super easy 'pit stops.' It's like pajamas that help you ski better. Features: - Slim Fit - 100% Merino wool interlock knit - Interlock knit provides ultimate comfort - Flatlock seam construction designed to eliminate chafing - 21" (53.3 cm) center front zipper with semi-locking slider - Front fly and zippered drop tail for no-fuss nature breaks - Close-fit hood for ease of movement and under-helmet fit - Zip chest pocket and thumbholes at wrist - Knit in Vietnam: 100% Merino Wool - 530 g = 18.7 oz - Last Chance: Discontinued Style - Only available to ship within the USA