Voler Sol Skin Leg UV Protector Silicone gripper at the top ensures a comfortable, secure fit. Offers sun protection of 50+ UPF. The Quantum DSX fabric has excellent breathability while the dimpled surface reduces wind drag. Zippered ankle facilitates taking off or putting on garment. The articulated design prevents uncomfortable bunching behind the knee and helps keep them in place (the seam is worn behind the knee.)