This 2-pack nursing pads are highly absorbent and works great daytime as well as night time. I They onsist of 2 layers 390 gsm (70% bamboo viscose/ 30% organic cotton) + 1 layer smooth 280 gsm (70% bamboo viscose/ 30% organic cotton) with an outer layer of a waterproof polyurethane-coated polyester that breathes but does not let moisture through.