Hansaplast Blister Plasters Large relieve pressure and pain immediately due to the Hydrocolloid Technology - this protects the affected area and relieves pain instantly. The active gel cushion is based on the principle of moist healing and contains superabsorbers. These soak up blister fluid and allow a protective layer of gel to form over the wound � creating the ideal conditions for healing. Hansaplast Blister Plasters Large are suitable for use anywhere on the foot, but they�re especially useful for heels and balls of the feet.