Hanes Ultimate Thermal Crewneck The ultimate in comfort! Our Hanes Ultimate Collection is made with comfort features in every detail, including flat no rub seams and a soft, thermal organic cotton blend fabric for all-day comfort. X-Temp technology adapts to temperature, environment, and activity to keep you cool and dry for all day comfort. FreshIQ advanced odor protection technology attacks the odor-causing bacteria in clothing that causes clothing to smell - so now you can feel fresh all day. Sturdy seam construction for added strength and durability with smooth, flat no rub seams to prevent chafing. Built-in shrinkage control helps ensure a lasting fit. Stretchy rib-knit cuffs keep their shape wash after wash Size up for a roomier fit For all-over warmth, pair with our matching thermal pant.