?Designed For Baby Sleep?When sharing a room with baby, you no longer have to worry about the lights interfering with your baby's sleep. This cover will provide a dark space for your little one to sleep better, day or night. Moreover, It also gives protection from mosquitoes and cats. ?Breathable Fabric? Made of high quality breathable fabric, do not contain flame retardants. Outfitted with One top panel and two side panels for better airflow to keep your little one cool and comfortable. ?Adjustable Side Panels?According to the light and temperature of the room and your child?s condition. You can lift the two side panels completely or half to adjust the light level and provide better air circulation. ?Lightweight And Portable? Weighs less than 2 pounds; Easy to use and compact enough to fit inside carry-on luggage. A must for family travel with baby. ?Compatibility? Suitable for most standard rectangle pack'n play and portable travel cribs that take up to a 37.5 inches x 25.5 inches mattress. Not for 4moms playard. Tighten the four corners, then attach and adjust the straps that can make the cover more suitable without collapsing.