Smartwool PhD Women's Black Crew Neck Performance Top Size Small S Elevate your cold-weather workouts with this high-performance Smartwool PhD Crew Neck Base Layer top! Engineered for active use, the premium PhD (Performance to the Highest Degree) line combines natural Merino wool benefits with quick-drying performance synthetics. Premium Performance Features: * Merino/Poly Knit: Blends wool odor control with fast-drying synthetic durability. * Mesh Venting: Gender-specific, body-mapped panels dump heat where women sweat most. * 360° Reflectivity: High-visibility reflective logos for safe low-light workouts. * No-Chafe Design: Flatlock seams and rolled shoulders prevent backpack strap rub. * Athletic Fit: Slim, next-to-skin cut with an elongated hem that stays tucked in. **Different Brands fit different ways, please check your measurements against the measurements in the photographs:** Thank you for shopping with me! :)