|Privately held company|
Vi-Spring is a bed company founded in 1901 in Plymouth, in the South West of England, marketing beds made of natural materials. Part of Vi-Spring's notability comes from being the first English bed makers to use the Marshall patent pocketed spring coil now commonly referred to as the Marshall coil. By 1914 Marshall Mattress of England were found in luxurious hotels, clubs and ocean liners, including The Queen Mary & The Titanic.
VI-Spring was founded by two Marshall Mattress agents of James Marshall who granted them patent rights to produce Marshall mattresses in England. They continued to use the Marshall name until the early 1930s at which point they rebranded as VI-Spring. 
Vi-Spring beds are handmade using natural materials such as wool, cotton, horsehair, coir, silk, cashmere, mohair and alpaca fleece rather than synthetic materials and foam. The “VI” in Vi-Spring stands for the Roman numeral 6. This represents the six turns to each coil which has been their trademark. The coils are made with Vanadium Steel Wire, which acts to improve spring resilience properties and creates more consistent springing that may be less likely to suffer height loss with use.
- VI-Spring UK.com. "A Closer look". VI-Spring Inc.
- Anderson, Gordon T. (2004-05-12). "A Bedtime story, for $20,000". CNN Money.com.
- Careless, J.M.S. "Partners in Progress - Marshall Ventilated Mattress Co. Ltd." ONTARIO: A Celebration of Our Heritage. Missisauga: Canadian Heritage Gallery, Copyright © 1991, 1992 and 1993. 384-85. Print.