Shopping at any of our Mattress King locations gives you the chance to test out as many beds as you’d like to find the right firmness level for your needs. Our friendly sleep experts can help you find the perfect mattress in a completely pressure-free shopping environment Buying a mattress online can be overwhelming for some customers, which is why we are proud to provide all of our customers with a laid-back and enjoyable in-store shopping experience 7 days a week.