Isabelle Hof (Author) Isabelle Hof is a certified Wim Hof instructor and co-founder of the global Icewomen Community. She has a Masters in Psychology, informing her motivation to help people understand their minds and bodies. She currently manages the Wim Hof Academy. Follow Isabelle on Instagram @isabellehof. Laura Hof (Author) Laura Hof is a certified Wim Hof instructor and co-founder of the global Icewomen Community. She is a holistic therapist and speaker, and has been working for Innerfire since 2014. Laura can be found on Instagram at @laura_hof_alchemy.