LINE PROTECTOR EASY SIZE AND ADJUSTMENT. You can check that you have selected the correct size by measuring the upper arm circumference in centimeters. Your waterproof cover can be used on both left and right arms and easily fits both men and women. 11 inch length. Keep Your Line/Midline Dry - This waterproof midline protector uses two reinforced neoprene seals that prevent water leaks, allowing you to swim and shower safely. confidence. Easy to use: This waterproof line protector is designed to stretch easily over the cast, then the diaphragm self-seals tightly around the arm without tape or straps; Simply slide the waterproof ring over your arm then pull down slightly to form a protective waterproof seal DURABLE AND REUSABLE: Our line cover made of quality PVC, durable and not easy to rip or tear, cast iron cover is eco-friendly, reusable and washable; suitable for daily use, such as therapeutic care, bathing, showering and many outdoor activities PROTECTION AGAINST VIRUSES: This waterproof elbow pad is ideal for chemotherapy in the shower, bath, swimming. Especially for people recovering from chemotherapy treatment, surgeries, skin problems.