Meet HeatGear® Sonic. We started the "performance" revolution in sportswear with the original HeatGear®. But since "relentless innovation" is part of our motto, we didn't stop there. This latest fabric takes comfort to the next level-lighter, with a sleek, softer feel that you can wear all day. 4.7 oz. Polyester/Elastane

• Ultra-light, super-soft, smooth fabric provides extreme comfort and very little weight
• 4-way stretch fabrication allows greater mobility and maintains shape
• Anti-odor technology prevents the growth of odor causing microbes
• 30+ UPF protects your skin from the sun's harmful rays | Signature Moisture Transport System wicks sweat away from the body
• Smooth, chafe-free flatlock seam construction | Mesh-knit jacquard neck construction for durability

Ultra-light, super-soft, smooth fabric provides extreme comfort and very little weight