First, look at the leather jacket & nbsp; fabric sofa the key is to choose leather. Purchase should note that the sofa seat, the back cover is preferably looper structure, high-grade cotton lining fabric sofa generally, other polluted sites should be able to wash. Sofa fabric should be relatively thick, its gram focuses on more durable 300 g / m² or more, and must ensure that the friction surface can not afford more than 12,000 times ball. To choose to buy fabric sofa fabric latitude and longitude lines fine smooth, no jump wire, no exposed joints, feel stretched Jin there. & Nbsp; Second, look at the internal structure of sophistication & nbsp; sofa fabric, usually at the bottom have zipper can be opened, we can pull the cloth under the seat bottom corner to see if there is rotten, insects, scars, without tree leather or wood hair smooth hardwood production, and convergence at the material and the material is not nailed, but in mortise or carved mouth bite each other, then glue in prison, there is no problem. This avoids sofa bed vermin, extend the life of the sofa bed. & Nbsp; Third, look inside the sofa foam sponge filler & nbsp; sofa filler mainly sponge, high elastic sponge by the resilient, high-elastic ultra soft shot three. Shot back and do a sponge handrails, high elasticity and high elastic super soft sponge seat section, you should use high-end sofa cushion density 30 kg / cubic meter or more high-elastic foam sponge, back pad should be used density 25 kg / cubic meters above the high-elastic foam sponge. As consumers can sit down and get a feel for comfort. Under normal circumstances, the sofa cushion to sag about 10 cm of the human body is best to sit down. & Nbsp; Fourth, the brand is & nbsp; purchase should try to choose a professional wood like red Nine Aung visibility, credibility better production of sofas. Because the brand is the consumer generally recognized in the long-term use, stable quality, low repair rate, long warranty and service guaranteed.