I picked the Color Sense Cool & Crisp Percale Fitted sheet in Twin size.  This sheet is made of 100 % cotton which is a great material for keeping it cool. It also gets softer the more times you wash it.  The material is light and has a percale weave to it. It does have a smooth feel and a matte type finish to the material.  The size is 39 inches x 75 inches + 15 inches so it fits a twin size mattress well.  I am actually using it on my couch on the three cushions to protect the couch and keep the cushions together.  This is a good sheet and I recommend it.