UNDER ARMOUR DROP THE HAMMER MENS T-SHIRT - Drop the hammer on those last couple miles. The T-shirt that won’t weigh you down. Updated lightweight UA Tech™ fabric with an ultra-soft, natural feel for unrivaled comfort. 4-way stretch fabrication improves mobility, while helping to maintain shape. Signature Moisture Transport System wicks sweat away from the body, keeping you cooler and drier. Anti-odor technology prevents the growth of odor causing microbes, keeping your gear fresher, longer. Smooth flatlock seams allow a full range of motion without chafing. Polyester.