Does the mattress need to be kept in a plastic wrap during the trial? Simba - Odyssey January 18, 2018 09:24 Follow Not at all! Feel free to dispose of the packaging and use your Simba Hybrid how you usually would. Related articles How does the 100 night trial work Do we have to pay to trial the mattress? Do I need a receipt during the guarantee? I have a sore back - would a Simba Hybrid help? How do I contact you? Comments 0 comments Article is closed for comments.