IntelliSkin Men's Newest Essential Tee | Ultimate Undershirt with Posture Correcting Technology and Smart Compression The Ultimate Undershirt! PostureCue Technology Signals posture and upper core muscles to switch on and align your shoulders, spine and trunk. SMART COMPRESSION Our lightest weight technical fabric adjusts posture and strengthens core muscles like an Intelligent Second Skin. Ultra-lightweight. Italian Nylon/Elastane fabric blend for all day comfortable compression. STAND TALL- Our motto is our function. High-performance gear built to keep you standing tall. 4-way stretch / Moisture wicking