CUSTOMER SERVICE?- We stand behind our products and service. The product comes with 30 days money back, 3 years warranty. Please don't hesitate to contact us if you have any question. AGE 5-12?- The color matching is fully in line with the aesthetics of 7-12 years old, the square frame is suitable for boys and girls, and the weight of 15.7g will not affect the development of children. FULL OF CHILD’S TASTE DESIGN?- Detachable design makes wearing more fun. No tools required for disassembly, allowing children to enjoy the fun of building blocks. Anti-slip foot covers can be installed, anti-slip can be used during exercise, and can be disassembled according to needs. SAFE AND DURABLE FRAME?- TR90+ soft silicone material, flexible and light, durable, will not pinch the face, the memory leg can be adjusted according to the children's face,Light texture, no sense of weight-bearing, no pressure on the bridge of the nose, care for the healthy growth of children. FILTER BLUE LIGHT LENS?- Effectively filter harmful blue light and protect children's eyes. When children are playing mobile phones, watching computers, playing games, and watching TV, the high-definition lens restores the true colors, making the vision comfortable and the picture clear.