The Mountain Warehouse Women's Keep The Heat Thermal Top is crafted from a blend of 41% Acrylic, 32% Polyester, 19% Viscose, and 8% Elastane. This long-sleeved, round-neck top boasts a plain design that offers a sleek, minimalist look. The fabric technology includes Heat Retention for maintaining warmth, High Warmth to keep you snug, Isotherm for even heat distribution, Lightweight construction for comfort, Moisture Wicking to keep you dry, and Quick Dry properties for convenience. Sizes range from 16 UK (41 in) up to 28 UK (56 in), ensuring a perfect fit for all.