This Room Darkening grommet curtain uses three layers of inner woven structure to create ultra-thermal technology, make the curtain more functional, warm in winter and cool in summer, save energy budget, maintain privacy, bring a rich luxurious look and ultra-soft feeling to your Windows and rooms, let you enjoy a quiet and peaceful environment, the Room Darkening effect is based on the darkness of different colors, from light to dark, With shading effects ranging from 50% to 100%, hang these insulation panels on your bedroom Windows to bring a new look to your home decor, make your home environment elegant, and let you enjoy your time at home.