How to Say "mattress" in Spanish
The Spanish word for “mattress” is “colchón” — A1 level. This is a very common word in everyday Spanish.
English → SpanishA1
nounA1
the large rectangular pad for sleeping on

Examples
Este colchón es muy cómodo y blando.
This mattress is very comfortable and soft.
Necesitamos comprar un colchón nuevo para la cama de invitados.
We need to buy a new mattress for the guest bed.
Gender and Articles
Since it ends in -ón, it is a masculine word. Always use 'el' or 'un' with it.
Colchón vs. Colchoneta
Mistake: “Using 'colchón' for a yoga mat or a thin camping pad.”
Correction: Use 'colchoneta' for thin, portable mats. Use 'colchón' for the thick one on your bed.
Related Translations
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