The thermometer is heading north of 90% today here in Cambridge, MA and it seems to be just as hot throughout most of the U.S.  If you are looking to keep things cool at night give linen sheets a try.  Natural linen sheets will stay cool to the touch in the hot summer months.  Also, 100% linen is extremely absorbent so you stay dry in the hottest of weather. Why not try a set of crisp white sheets this summer?  They'll look and feel fresh.  Combine them with a white woven blanket and some pretty floral throw pillows and you'll feel like you are in a lovely summer cottage - even in the heart of the city.