<p><br />This is a pack of pure magic. A scientifically engineered Grid-Relief Technology that uses a mechanical action to create a micro lift in the skin, helping drain the lymphatic system to release biochemicals that cause the itch sensation.</p><p>Itch Relief Patches will start working in 30-60 seconds to relieve the itch, and can last for up to 7 days (and are completely waterproof).</p>