Key benefits - Energy efficiency and comfort: winter window curtain is designed to keep heat in the room and reduce drafts, making a noticeable difference in room temperature. It also helps block heat from entering in hot weather, helping to keep the interior cooler. - All-weather protection: windproof, waterproof, and sound reducing, plus blackout and privacy features. The blanket-like quilted thermal insulation helps seal the window and reduce heat exchange. - Enhanced privacy and light control: blackout capability provides privacy and light management for better sleep or focused work. Material and construction - Heavy duty quilted thermal insulation: thick and substantial build for reliable warmth and temperature control. - Outer shell: high density waterproof coated Oxford cloth. - Liner: double-layered and thickened with new silk, fluffy and soft, providing additional warmth and comfort. - Overall effect: strong against the cold and capable of making a difference in heating the adjacent area this winter. Size and compatibility - Actual curtain size: 38 inches wide by 62 inches high (38" W x 62" H). - Compatibility: designed to fit windows up to 3 feet by 5 feet (3' x 5'). - Fit guidance: please measure the width and height of your window before purchase to ensure proper fit. Design features - Unique roll-up design: includes two sticky strips on top that allow the curtain to be rolled up for an outside view. - Sealing when in use: when rolled down and the loop attachments are connected, the curtain forms a tight seal around the window to minimize heat loss. Use scenarios - Winter living room or family space: roll down for heat retention and draft protection, creating a warmer living area. - Bedroom or nursery: blackout capability helps improve sleep quality while maintaining privacy and reducing outside noise. - Home office or study: maintains a stable interior temperature and reduces glare or light distraction when needed, while still offering an option to roll up for a view.