Our altar cloths feature premium quilt quality cotton on both sides. They are reversible,  so it's like getting 2 altar cloths in one!  The cotton is thick, sturdy and durable.
 
They are sewn by me (Mandi), and are washable delicate cold and we recommend a line dry to keep the colors bright.  The medium altar cloths measure approx. 17-18" x 21-22".