It is elastic both vertically and horizontally, so you can wear it perfectly. ■ Size ■ Ladies size/extra-large 220.5 lbs (100 kg). Womens size, arm opening size 20cm to 30cm, extra large size, arm opening size 24cm to 36cm, extra large size 20cm to 30cm, arm opening size 28cm to 42cm, material is knitted fabric, 0.04 inch to 16.5 inch (1 mm) thick, smooth fabric.It stretches very horizontally and vertically. Material: 84% polyester, 16% polyurethane. Product Care: Machine wash gentle cycle.