This item was worn by my daughter, who was born in December 2024, for about 3-4 months. It's 100% cotton, but it's a gauze-type undershirt, made of warm material for winter. In the dead of winter, I dressed her in this fabric's short and long undershirts. As it got warmer, I used thinner fabric for the short undershirts, so these short undershirts haven't been used much. Would these be suitable for preparing for a newborn baby or for spares??