Contemporary science has already proven that Wim Hof's legendary method based on breath, mind and cold work can indeed significantly help overall physical and mental health. It gives us much needed energy, improves circulation and resistance to stress, boosts the immune system, strengthens overall physical fitness and makes it easier for our bodies to cope with illness. Wim has been developing his method for several decades and has tested everything directly on himself. He has run a half marathon in -30°C in just shorts, swum hundreds of metres under the ice, lasted 90 minutes in the ice without changing his internal body temperature, and sped up his metabolism by more than 300 percent. This book documents how anyone who adopts Wim's method can quickly and safely improve their health and strength. A practical book with specific instructions for anyone who wants to practice the Wim Hof Method. Including a 30-day challenge for those just starting out with the method.