There’s a reason Jessica Biel made this cashmere onesie her go-to pregnancy outfit. This versatile wardrobe staple by Hatch maternity can be worn on its own or over your favorite tee. It can also be dressed up by adding a blazer, scarf or both. We love that it's comfy and chic – the perfect match for pregnancy wear. The merino and cashmere blend makes it soft and affordable (for cashmere).