Slip into dreamland with Threshold Flannel Sheet Set in Mini Houndstooth. These sheets are made of super soft and cozy flannel. Imagine sinking into a smooth and toasty bed after a long, hard day. If you've never tried flannel sheets before, you've got to try these. Made of 100% cotton, this sheet set will become an instant portal to a good night's sleep. Machine wash in warm, tumble dry.