Energy Savings: Windows are the leading source of heat gain and loss, accounting for nearly 50% of the heat that enters or leaves your home. But no matter what the season, you'll save both energy and money with Redi Shade. Many of our shades block sun's hot rays in the summer and provide cozy insulation during the cold winter months. And like all of our shades, they're easy and fast, giving you a custom look without the fancy price or installation hassles.