Yes, the Lull mattress requires a 30-night break-in period before you can initiate a return. Lull backs each mattress with a 365-night trial, so to account for the break-in period, you’d have between 30 and 365 nights to return the mattress.
While you can technically sleep on the mattress as soon as it expands (usually 2–5 hours after unboxing), both your body and the mattress materials need time to sync up.
