The Under Armour Men HeatGear® Sonic Compression Longsleeve is at the pinnacle of the baselayer game. Offering exceptional comfort and ultra tight, conformational fitting through the 4-way stretch fabrication system. The compressed fit helps wick sweat away from the body, leaving you feeling cool and fresh especially in warmer conditions using the innovative signature moisture system. This is coupled with the anti-odour technology which prevents the growth of unwanted bacteria and chaff-free flatlock seam construction. The fabric consists of lightweight Polyester and Elastane which offer high performance and durability. Compression helps to activate the working muscles without causing any restrictions.   Size Chart Chest (cm) | Waist (cm) Small: 86.4-91.4 |  71.1-73.7 Medium: 96.5-101.6 | 76.2-81.3 Large: 106.7-111.8 | 86.4-91.4 Extra Large: 116.8-121.9 | 96.5-101.6