Octave Mens Thermal Underwear Long Sleeve 'V'-Neck T-Shirt/Vest/Top 'V' neckline cut to appear discrete under outerwear, yet maintaining warmth Fully brushed inside for extra warmth & softness. Ribbed fabric for added stretch and comfort. Body contouring guaranteed perfect fit. Excellent wicking rate draws sweat away from your skin. Cosy & warm but lightweight thermal material. Side seam free for added comfort. Easy care home machine wash at 40C. Maintains warmth even after many washes.