Octave Boys Thermal Underwear Long Johns/Pants/Long Underwear 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 the skin. Cosy & warm but lightweight thermal material. Easy care home machine wash at 40C. Maintains warmth even after many washes. Covered elasticated waist for comfort. Soft cuff at ankle - ideal for layering & tucking into socks.