2XU Men's Elite Compression Long Sleeve Top lycra-blend Imported Hang Dry Supports and protects shoulders, forearms, deltoids, back and core muscle groups Muscle Containment for reduced vibrations and oscillation, less fatigue and muscle damage Better muscle alignment for increased power and endurance, better postural position and improved breathing and agility A combination of certified 70/105 Denier Invista LYCRA Compression with a 360 degree fabric knit construction for a consistent yet powerful pressure Lightweight and breathable fabric with SPF 50+ sun protection for all day comfort