Inclusion Criteria:  Participants fulfilling all of the following inclusion criteria are eligible for the study:  Patients (11-18 yrs.), who need a new orthosis (visit to an orthopedic technician) Patients (18-65 yrs.), who need a new orthosis (visit to an orthopedic technician) Informed Consent provided as documented by signature Confirmed diagnosis of cerebral palsy Confirmed diagnosis of spastic equinus and/ or drop foot, Gait pathologies treated with conventional AFO Gross Motor Function Classification System (GMFCS) level I or II  Exclusion Criteria:  Other neuromuscular diseases Surgical intervention lower extremities past 12 months to improve gait pathologies Injections of Botulinum toxin 6 months prior to study inclusion Inability or unwillingness to follow the procedures of the gait analysis in women: pregnancy