We are committed to delivering exceptional king size spring mattress-king size foam mattress-types of mattresses used in hotels's design and performance for customers home and abroad. It is a featured product of Synwin Global Co.,Ltd. Its production process has been improved by our R&D team to maximize its performance. Moreover, the product has been tested by a third-party authoritative agency, which has great guarantees on high quality and stable functionality.. Synwin strives to be the best brand in the field. Since its establishment, it has been serving numerous customers at home and abroad by relying on internet communication, especially social networking, which is a significant part of modern word-of-mouth marketing. Customers share our products information via social network posts, links, email, etc.. Benefits are the reasons customers buy the product or service. At Synwin Mattress, we offer high quality king size spring mattress-king size foam mattress-types of mattresses used in hotels and affordable services and we want them with features which customers perceive as valuable benefits. So we try to optimize services such as product customization and shipping method..