We get this question all the time.
Is the 'Wonder Sheet' fitted sheet hot to sleep on?
Short answer: NO!
Long answer: No its not. Satin is a man made fibre and 100% polyester so theoretically it doesn't breath so you can think it could be hot BUT its not if its used correctly. Satin is a beautiful, hard wearing and luxurious feeling fabric. We use a glossy charmeuse satin which is light and soft. You may know the satin that is hard and crunchy... yuk!
When I was designing the Wonder Sheet for my dad I had to think about the heat factor because we were in Queensland (no aircon) and he had Parkinson's disease which meant he perspired very easily.
Its the unique design of the Wonder Sheet and the position of the satin that makes it NOT hot. Your feet aren't on the satin so they don't increase in temperature which means the rest of your body stays the same temperature.