We don't use a top sheet ( my husband gets tangled up in it & drives me to drink!), so we just use our feather quilt as our topper, (even in the summer). Of course, we need to keep that clean, so we have used duvet covers to protect the quilt, and so, of course, that means the duvet cover is closest to our bodies every night. The softer, silkier the duvet cover, the lovelier our bed. This set is the finest thread count we've ever experienced and is perfectly luxurious for our soft, silky warm weather bed.