Under Armour UA FTHR Shield TRC Storm Running Shoes Synthetic UA Storm footwear uses P2i technology to repel water without sacrificing breathability or adding weight Ultra-supportive, ankle-hugging CompFit&#174; sleeve delivers an incredible, snug feel built to give you an extra boost of speed HeatGear&#174; fabric wicks away sweat to keep feet cool, dry, and light Full-length Micro G&#174; foam turns cushioned landings into explosive takeoffs TPU spring plate built into midsole transfers heel-strike energy forward