Blackout Solution: The Window Blockout is designed to provide total darkness in your child's room, helping them sleep better without disturbances from sunlight. Three-Layer Design: Made from three layers of material, with a completely opaque inner layer that blocks 100% of sunlight, ensuring optimal darkness for sleep. Reflective Outer Layers: The outer layers of the blind are white, which helps reflect light away from the windows, contributing to a cooler room temperature for a more comfortable sleep environment. Reusable and Static-Cling: The Window Blockout adheres to windows using static cling, meaning it can be reused multiple times without leaving any sticky residue. It can be easily removed and re-applied as needed. Portable: The blinds can be rolled or folded for easy storage when not in use, making them convenient for travel or use in different rooms. Easy Installation: The blinds come in a roll, allowing you to cut them to size and apply them to the panes of your windows. They can be easily installed and removed as needed. Suitable for Single or Double-Glazed Windows: Best suited for single or double-glazed glass windows in nurseries or any room of the house. Note: Not suitable for frosted windows, windows with a non-smooth surface, or privacy glass or plastic. Before purchasing, it's important to measure your windows to determine how many rolls you'll need to cover them effectively. Overall, the ergoPouch Window Blockout 2Pack offers a practical and versatile solution for creating a dark and comfortable sleep environment for your child, helping them sleep better and longer.