Will any pillow slip do?

In a pinch, yes, but if you want the best out of your pillow, make sure you use an all-natural pillow slip that breathes. We use bamboo casings for a reason – they stay cool, and they breathe. If you put polyester or synthetics on your pillows, you are preventing your pillow from breathing, making the pillow hot and damp; you are simply not getting the most from your pillow. Use pillow slips made of either Bamboo, Cotton, Silk, Hemp, and so forth to optimize the benefits from your pillow.