Academic, international conference pertaining to the advancements of electron spin resonance (ESR or EPR), with an emphasis on methods development, but also including applications and instrumentation innovations. Attendance is typically 100-150 delegates, including onsite accommodations, meals, and a banquet with prizes. The banquet is limited to 150 delegates. Industry representatives provide posters and product information. The start is on Monday afternoon with a social and end is at Friday after lunch. The plan is for 100 % in-person.