MOTUS FLEX MENS insole The Primus Lite IV is

The Primus Lite IV is our original training all-rounder

Leave it in your shoe for more warmth and protection

and a sock-like construction to keep out trail debris

The Proprioception Mat stimulates many nerve endings in your feet to enhance the brain foot connection

The Rehab Mechanic's Cork Roller provides targeted relief for tired feet

MOTUS FLEX MENS insole The Primus Lite IV isThe Motus Flex is our most barefoot feeling performance trainer, providing unparalleled barefoot feeling and flexibility for calisthenics, primal movement, bodyweight training and more. Feel barefoot when you can't be ' and experience every sensation.