Sheex, online at sheex.com, save money on hot items when shopping on Sheex when applying our coupons, promo codes during checkout. Trust us, these coupons are good. Make the best of our Sheex promo codes to get 20% OFF. All discounts are totally free to use. SHEEX, Inc. is a bed linen company based in the United States. The company was founded in 2008 by former athletes and basketball coaches Susan Walvius and Michelle Marciniak. SHEEX linens are notable for being constructed not from cotton or silk but the type of advanced performance fabrics commonly found in modern athletic wear.