Color ChoiceGray is elegant, it can perfectly match your different styles of furniture. Navy blue is more artistic and romantic, adding youth and vitality to your daily life. It will attract everyone's attention! USB Charging Port DesignWe have added two USB charging ports to improve your use experience. You could lie on the floor folding sofa and charge your ipad or phone while playing games, watching TV, or chatting with your friends online. Size OptimizationThe overall size of foldable chairs indoor is wider and longer than others which on the market, we also widened the armrest to 4.53", which is more suitable for our daily use. After optimization, the size after flattening is 26.0 x 71.3". Structural ImprovementAll adjustable metal buckles imported from Japan. Durable and long-lasting. 90 ° to 180 °, 5 angles can be adjusted to meet various needs.. We designed the armrests to be removable so that it can be more easily folded and stored in your cabinet.