What is the sheet made of? Simba - Odyssey March 29, 2018 01:37 Updated Follow The Fitted Sheet is 95% jersey cotton with 5% elastane that gives it that stretch and is infused with Aloe Vera. Related articles What makes the Simba sheet special? How long does the Aloe Vera last? Can you take away my old mattress? Is there a thread count of the Fitted Sheet? What colours do they come in?