A smooth to the touch 280 thread count organic cotton sateen mini co-sleeper and/or pack and play sheet perfect for all weather, especially the hotter season. The organic cotton has a cooler feel than polyester due to its natural breathability. Hydrogen peroxide whitened for a simple elegant feel. Softens further after washing. Machine wash and dry on regular. Add 1/4 cup of vinegar to the load to increase softeness. Fabric is not pre-shrunk and will shrink to the proper size once washed and dried. Covered elastic is featured around the entire sheet to ensure the best fit. We recommend measuring your mattress or the inside of your mini co sleeper to verify the size before purchasing. Made here at our San Diego, CA Facility. Ships out within 1 to 2 business days.