Does the Backpack Provide a Moist or Dry Heat Application?
Your Heat Treat Backpack applies moist heat. The heat-retaining fill used in the Backpack is 100% whole grain oat seed. This seed contains its own natural 12-15% moisture content and this provides the moist heat. You should never apply moisture to your Backpack. The grain is capable of renewing its natural moisture content, from the atmosphere, between applications.