Not exclusively—Nectar mattresses use materials sourced and manufactured internationally, including Vietnam, Malaysia, China, Mexico, and the US.
When asked directly, Nectar states the following:
…products are sourced and manufactured internationally including in the USA and then distributed by warehouses located across US.
Nectar customer support chat
Nectar goes on to say that the mattresses are designed and orders are processed in the US. All Nectar mattresses are also shipped from within the US, which allows for fast shipping speeds and easier returns if needed.
However, since materials are sourced internationally it is not assembled or manufactured in the US.
The Nectar Mattress may be manufactured in Vietnam, Malaysia, or China. The foam may be filled in the USA, and the covers may be made in Mexico.
The manufacturing location specifics are listed on each mattress’s manufacturing labels and may be different for each mattress that is purchased.