These bra extenders are made of nylon. and comfortable to wear. Easy to use and wash. They feel perfect normal. Leave no tracks, no pinch on your tender skin. 3 rows and 5 hooks makes them work well. They help add extra room and comfort when wearing bras. Help save money by prolonging the lifetime of your favorite bras. Great for pregnancy and weight gain. Features - Color: Black. - Material: Nylon and stainless steel. - Size: Approx. 9.5 x 5 x 0.5cm. - 3 rows and 5 hooks makes them work well. - Feel perfect normal. Leave no tracks, no pinch on your tender skin. - Made of nylon, the bra extenders are to wear and easy to wash. Help add extra room and comfort when wearing bras. - Help save money by prolonging the lifetime of your favorite bras. - Great for pregnancy and weight gain.