Side-seamed. Unisex. Size (Chest to fit ins) - XS - 37-39, S - 39-41, M - 41-43, L - 43-45, XL - 45-47, 2XL - 47-49. Weight - 122g/m². 52% Combed and ringspun Cotton, 48% Polyester*. * Marble - 91% Polyester 9% Combed and ringspun Cotton,136g/m². Neon - 52% combed and ringspun Cotton 48% Polyester,122g/m².