Jobst Bella Strong 20-30 mmHg Ready-To-Wear Compression Arm Sleeve with Silicone Border. Soft, open knit arm sleeve ideal with cotton like feel. Moisture wicking. Features 5cm silicone band to keep sleeve firmly in place. Available in two lengths: Regular and Long. Latex free. 83% nylon, 14% spandex, 3% silicone. As Jobst Medical Garments provide moderate to extra firm compression levels (15-20mmHg, 20-30mmHg, 30-40mmHg), it is important that a comprehensive assessment is performed before Garments are prescribed.