Rubber boots are a popular and feasible choice but they can be uncomfortable at first. Here are a few tricks you can use to make your rubber boots more comfortable. First, if the boots are too tight, you can use a hair dryer to loosen the rubber material a little. Set the heat to high and keep the hair dryer at least 6 inches away from the boots. Keep heating until you feel them loosen up as needed. The second thing you can do is get a cushioned insole if the boot doesn't already have one. Lastly, dry your feet properly before wearing the boots, as wet feet in rubber boots can lead to blistering.