Can you put your own pillow case over Ereada® amethyst pillow without blocking the effects?

To eliminate the crystals’ pressure,  the standard white pillowcase made of cotton (or several of them) can be put on the pillow. It will not block Ions and FIR crystal rays.

Our pillows are unpowered with amethyst crushed and tumbled crystals. 

Same as the amethyst unpowered mat, they can absorb excessive heat from your heat and redistribute it in the form of Infrared Rays to those areas of your head and neck which need more warmth.