MATERIAL - 90% cotton + 10% Spandex. Extremely soft & comfortable. FLEXIBLE SIZE - Hooks can easily modify the width of the bra if you need and are easy to snap on and off quickly. DESIGNED FOR BREASTFEEDING MOTHERS - It offers no compression with a deep V-neck. Removeable pads serve convenience of usability as per the need or simply desire. Triangle-cup design gives strong side force to hold the breasts up (3-D supporting), and the shape covers the whole breast and keeps them in place. It has a 4-inch wide side band to conceal armpit fat and produce support and coverage. EASY TO UNSNAP WITH ADJUSTABLE STRAPS - Motherly Sleep Bra for nursing is easy to unsnap with one hand, offer enough elasticity in the band that it holds everything in without crushing your chest, with adjustable straps. SWEAT RESISTANT - Breathable holes design on the cup makes it sweat resistant.