Pretty, white fabric feels almost like cotton bedsheet and folds nicely to the size of a book for complete portability. Great for home or travel. Tested to provide 22dB attenuation up to 1.8 GHz, no grounding necessary. Extensive zipper for easy in/out and ample 98x35 inch space is plenty of room for the average adult. Wash cold (40°C) with gentle cycle using mild detergent only! Spend the whole night or enjoy a completely new kind of power nap!