NTHN Sizing Guide
NTHN boxers are engineered for high-performance and run small.
Because we use 0% synthetic stretch in our liner, the fit is more secure than traditional plastic-based brands.
⚠️ Standard Athletic Fit: Choose one size up for a fit that hugs the legs while leaving the crotch zone loose and breathable.
⚠️ Max Freeball Experience: Choose 2 sizes up for the ultimate "freeball" experience with maximum ventilation.
Review your choice carefully—your health and comfort depend on the right fit.