Experts say you need two weeks sleeping on your new mattress to know if it suits your needs. Casper gives you a 100-night sleep trial and, if it’s not for you, they collect it and give you a full refund. At a third of the cost of other comparable mattresses and with a customer helpline seven days a week, it’s a dream. Visit casper.com and get 16% off, too, with code: REDSLEEP. Delivery takes just 2-3 working days.