one-time mattress exchange is only valid on Tempur-Pedic (90 days), Serta iComfort, Stearns & Foster and Sealy Hybrid (120 days). A mattress protector is strongly recommended on the same invoice as the mattress. Stains of ANY kind or abuse will automatically void the Sleep On It Guarantee. All tags must be still attached and in "like new" condition. The mattress must be used for a minimum of 30 days and no longer than 120 Days (90 Days on Tempur-Pedic). Not valid on floor models or closeout models. *See store for complete details.