The Jack undershirt is cut for a close, streamlined fit with a longer body designed to sit cleanly beneath shirts.  Crafted from Pima cotton and elastane for a soft, smooth feel with gentle stretch Slim fit with a longer body length, designed to stay tucked Crew neckline cut to sit neatly under collared shirts Short sleeve, lightweight and breathable for year-round wear The model is 6'2.5" / 189cm tall. He wears a size Medium.