BYC Mens Body Heat Wicking Compression Thermal Long John Underwear Top Bottom Arcylic 40%, Polyester 35%, Rayon 20%, Polyurethane 5% Imported Item includes One SET (Top and Bottom) / Top only / Bottom Only / BYC Body Heat Thermal Underwear is made of Solar Touch Performance Fabric for keeping Warmth and Fresh Condition Infrared Ray Vibration Activate the Performance Material's Molecular Motion and has Semi permanent Heat Effect Excellent for Thermal Retention, Sweat Wicking and Quick Dry, Light Weight and 4 ways Stretch Superior Comfort and Softness, Indivisually Packed in a nice gift box, 100% Brand New and High Quality Free Shipping, Shipped via korea Post Airmail, Delivery will take about 10 ~ 19 Working days, PLEASE REFER TO IMAGE of ACTUAL MEASUREMENT