Marshall coil

[5] He also licensed patent rights for the United Kingdom to his former employees; that company operated under the name of Marshall Sanitary Mattress Company until the early 1930s, when they changed their name to VI-Spring.

In January 2019, the Flex Group acquired the (Canadian) Marshall Mattress Company from then-owners, the Warner family, to continue manufacturing handcrafted mattresses.

Marshall produced pre-compressed cylindrical coil springs, each sewn inside an individual cotton fabric pocket, which provided uplifting support on its own.

When fitted together, the coils became an independent suspension system that contoured to each person's form and weight, providing unsurpassed support and comfort.

When upholstered, a finished Marshall mattress aims to reduce physical pressure under the sleeper, and claims to relieve it as well.