I purchased this new around January 2025, but it doesn't fit my baby's crib, so I'm selling it. The box is slightly crushed, but it is unused and unopened. GUSUMIN Anti-Roll Over, Anti-Face Down Swaddle Belt for Babies 【Compatible with Futons and Beds】When using with a futon, be sure to use a firm cotton-filled futon. 【Easy-to-Attach Straight Belt】Simply insert the belt into the sheet to attach. 【Usable Year-Round】Made of fabric, it can be used regardless of the season. (Adjust the room temperature when using in winter, autumn, or spring, rather than dressing the baby in thick clothes.) 【Secured in Two Places】Secures the baby in two places: around the abdomen and under the crotch. Set Contents: Straight belt, dedicated sheet, instruction manual *Please refrain from using in conjunction with a sleepsuit or covering with a blanket. When wearing a sleepsuit, the belt may be more difficult to secure than usual because the baby will be wearing thicker clothes. If you are going to wear a sleepsuit and then put the belt on over it, depending on the thickness of the sleepsuit fabric, there is a possibility that heat will build up. For the sake of comfortable sleep, please adjust the room temperature instead of using a sleepsuit.