Got the Hypervent installed under the mattress and custom flannel sheets from BedderBedding.net. Sheets were not inexpensive but fit really well and are good quality. We got a set of both flannel and 400 count cotton for summer. There is an option to have the top sheet attached or separate top sheet with elastic corners on the end. Dale at BedderBedding recommends the elastic as the sewn on top sheet tends to twist up in the washer. Works great. 56x77x5 fit perfect. Dale had me add a few inches to allow for shrinkage.
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