. Serve & Protect This House® in the essential UA Tactical T-shirt.. . WARNING! This product is not flame-retardant, never use this Under Armour® product as a substitute for flame-retardant or ballistic protective equipment; Do not wear it when exposed to extreme radiant heat or open flames; Under Armour® products that are not flame-retardant may melt in extreme heat that exceeds 350°—exposure of the skin to fire or flame can cause injury. Ultra-light UA Tech™ fabric has a softer, more natural feel for superior comfort. 4-way stretch fabrication improves mobility and accelerates dry time, while maintaining shape.