There are beads attached to the draught excluder (draft dodger), which go under the door and are supposed to roll with any movement and keep the excluder flush to the edge. However the beads may not work well on carpets or doors with a threshold.
Snuggle this sew-easy draft stopper close to the threshold to stop the winter chill from entering your house. When not in use, hang it from a doorknob with the added loop! I would use a plastic bag to hold rice, etc. before inserting into material.