LONG UNDERWEAR. UNISEX.95% Bamboo 5% Stretch. Thermal, wicks away sweat and moisture. Naturally Anti-Bacterial. The softest most comfortable long underwear you will ever wear. Available in Black, Purple and Navy.Top and Bottom are sold separately. Chest Size Chart for Long Underwear:XS: 33"-35"S: 36"-38"M / L: 39"-41"