Material & Size:A/B : 4.5*4.5inch C/D : 5.5* 5.5 inch96% nylon 4% spandex.high quality.chest pad side is sewn and no glued.no fading.the outer layer of the chest pad is made of soft fabric.which is very comfortable to touch.which is to protect the delicate skin of the breast. Pretty Breathable Comfortable Wearing: The below bra inserts are thicker than the top 0.5in.they are pretty breathable.even when sweating a lot.they don't interfere with the moisture-wicking properties of your sports bras. Lightweight Bra Inserts Stay in Place:Slip our bra inserts into the pocket of your swim top.more conducive to the accumulation of the chest.lightweight bra inserts stay in place.bra cups don't slip at all.move around.or stick out of your bras even when exercising pretty hard. Great Replacement for Original Pads: Replace your flimsy & trashed pads with these premium bra padding inserts now. and save yourselves from throwing out bras that are still perfectly fine (minus the old padding) Use In Any Top:Perfects for sports bra.bralette or any top you like!sports bra inserts pads dresses.bras for yoga or other sports.as well as bikini tops.swimsuits.sweaters & casual wear.swimsuit insert is great for those seeking not too much lift and natural appearance.