Amazon offers the AmazonBasics 400 Thread Count Cotton Duvet Cover Set in several colors/sizes (Smoke Blue Twin pictured) with prices starting at $19.37 $16.66 with free shipping for Prime members. That's up to $27 off list and the lowest price we could find. It includes one duvet cover and one pillow sham for size Twin/Twin XL and one duvet cover and two pillow shams for sizes Full/Queen or King.