Material:96% Nylon 4% Spandex.these are soft.smooth.thickness and easy to clean.Breathable & lightweigh.washable & reusable.this bra pads insert is stretchy.not easy to be out of shape Size: Pack of 4 pairs.Perfect for A/B cup or C/D cup.A/B Cup Size:approx.4.92inch x 5.2inch;C/D Cup Size:approx.5.5inch x 5.7inch.Giving you better fit and a more shapely silhouette Easy to Use: Removable Cups Inserts don't slip at all.move around.There are L&R marking at the top.Put the bra pads insert into the bra you like Well Made: Circum sewed and stitched processing design.never fall apart.So they don't shift and never have to readjust them.the step-in bras because they're so comfortable Wide Applicability:Best for everyday bras halter.strapless and bandeau.Such as wedding dresses.sweaters & casual wear.yoga bra.sports bra.swimsuits.Bikini or different purposes