90 Day 'Sweet Dreams' GuaranteeDescription Your sleep is important to us. To make sure you're using the right mattress, we're pleased to offer you a 90 day 'Sweet Dreams' Guarantee! You will have a full 90 days from the date of delivery of your new mattress to ensure you're 100% satisfied with its comfort. Add a Mattress Protector the various size options available. This applies to all of our mattress collections. This policy supersedes any verbal communication between Rest Therapy