The G-Thermal Base Layer 230g from GAMAKATSU is made with a material weight of 230g for extra warmth. The inner fleece surface is very nice against the skin. This base layer is ideal for wearing directly under a thermal suit in cold weather or under breathable waders for extra warmth. - 96% polyester / 4% elastane - Stretchy, tight, comfortable fit - Soft and warm fleece on the inside - Reinforced seams