Extremely thin (about 2 mm) and invisible under clothing. Soft and gentle inner layer for the skin. Made of natural material. Breathable layers. The skin remains dry and can breathe. Two sticky straps hold the pad to keep it from slipping. Three ultra-absorbent inner layers reliably absorb and retain milk, both day and night. The Philips Avent SCF254/24 24 Pcs Disposable Breast Pads help to support your breast feeding journey. Honeycombed texture, ultra thin ultra-absorbent core and leak proof & breathable design, make you feel dry and comfortable day and night. Outer layer provides leak proof effect to keep clothes dry, yet gives a breathable feeling. Ultra absorbent core helps to trap moisture and keep skin dry day and night. Only 2 mm thin on average with contoured shape, helps to make pads invisible under clothes.