4.2 oz., 32 single; 52% Airlume combed ringspun cotton, 48% polyester; Athletic Heather:90% Airlume combed and ring-spun cotton, 10% polyester; Black Heather CVC:90% Airlume combed and ring-spun cotton, 10% poly; Dark Grey Heather and Deep Heather:52% Airlume combed and ring-spun cotton, 48% polyester; Heather Prism Colors:99% Airlume combed and ring-spun cotton, 1% polyester; Eco-friendly; Heathered texture; Crew neck; Sideseamed; Relaxed fit; Due to the specialized washing process, each shirt is unique;