O'Gallery Premier Hotel & Spa is a sustainable hotel that combines luxury with environmental responsibility. The hotel has implemented energy-saving measures such as LED lighting and motion sensors to reduce energy consumption. They also have a water conservation program in place and use eco-friendly toiletries. O'Gallery Premier Hotel & Spa supports local artisans by showcasing their artwork and crafts throughout the hotel. With its commitment to sustainability and elegant accommodations, this hotel offers a unique and eco-friendly experience in Hanoi.