Under Armour Junior Superman T- Shirt - SS17 HeatGear Fabric - Incredibly soft and smooth for extreme comfort with very little weight. UPF 30+ - Protects your skin from the sun's harmful rays. 4-way stretch fabrication - Allows greater mobility in any direction. Signature Moisture Transport System - The fabric actively works to wick swear away and out of the garment, keeping you dry and cool. Anti-Odour Technology - Prevents the growth of odour-causing microbes.