Pure cotton fabric ：Made of 100% cotton, soft and skin friendly, moisture wicking, and breathable, it effectively cares for the tender skin of infants and young children, allowing them to sleep peacefully all night long. Widen hem without restraint：Integrated design of the feet, enlarged and widened to provide ample space for baby feet to move around, even the biggest movements feel unrestricted. Double zipper design, easy to change diapers without disturbing sleep：Double zipper, easy to put on and take off, no surprise when changing diapers. Velcro design：Velcro wings can adjust the elasticity according to the body shape, providing a snug and fully wrapped fit, giving babies a sense of security. Multi purpose item：The wings can be removed，take off the wings ，the baby swaddle transform into a vest sleeping bag,and the wing protector can be used as an independent wrapping towel and belly circumference.