Men's Long Johns

About

Stay comfortably warm without bulky layers with our men’s silk long johns, designed to provide lightweight insulation beneath your everyday clothing. Crafted from soft natural silk, these breathable base layers sit smoothly against the skin while providing an additional layer of warmth when temperatures fall. Ideal for commuting, working outdoors, walking, travelling or simply staying comfortable through the colder months, our men’s silk thermals are lightweight enough to wear discreetly beneath trousers and jeans. The smooth, flexible fabric allows easy movement without the heaviness associated with thicker traditional thermal layers. Lightweight Silk Thermal Long Johns for Cold Weather Our silk thermal long johns combine natural insulation with exceptional breathability, helping you stay warm without feeling weighed down. Silk naturally helps regulate temperature, retaining warmth when it's cold while allowing excess heat and moisture to escape as your body temperature changes. Their lightweight construction makes them particularly suited to layering, providing additional warmth without significantly changing the fit or feel of the clothing worn over them. Benefits of our men's silk long johns include: Lightweight insulation without unnecessary bulk Naturally breathable and temperature regulating Soft and smooth against the skin Easy to layer beneath trousers and jeans Flexible fit for comfortable movement Ideal for winter, travel and outdoor activities Available in a choice of versatile colours Build a Complete Men's Silk Thermal Base Layer Pair your long johns with one of our men’s silk thermal tops to create a complete lightweight base layer for colder conditions. Wearing silk thermals beneath your everyday clothing provides additional coverage across both the upper and lower body without relying on heavy layers. Explore our wider collection of men’s silk underwear for more comfortable everyday essentials, including silk boxer shorts , or discover our full men’