The men's Aetrex L800 Train Series feature Aetrex’s exclusive FitGuard slow recovery foam to help cushion your stride, absorb shock forces and provide the ultimate protection for your feet. Lynco Train Orthotics boast an ultra-soft fabric top cover that maximizes airflow and helps minimize moisture and offer a strategically placed arch support to help biomechanically align your body & help prevent common injuries such as Plantar Fasciitis, Arch Pain and Metatarsalgia.