When choosing luxuriously soft sheets, the cotton they are made of makes all the difference. Many materials make soft, comfortable sheets, but something special makes Supima® cotton stand out from the rest. Once you try them, you'll fall in love with the remarkable comfort of this American classic—100% Supima® cotton linens. Its extra-long fibers give Supima® cotton valuable qualities such as softness, strength and sheen. Grown and harvested exclusively in the southwest United States, the extraordinary quality of these extra-long Supima® staple fibers make up less than 1% of cotton production worldwide. These sheets will maintain their softness and color wash after ash.