Upper Back Strength Width:Narrow (for Very Narrow Shoes) It's available in both numeric

It's available in both numeric and alphabet styles and serves as a guide for exercises that enhance head and eye movement

which creates more space for the tongue to reach correct position

✓ Standard and wide width options available

They are chargeable via USB and are effective in improving pursuits and stimulating the brainstem and midline cerebellum

Upper Back Strength Width:Narrow (for Very Narrow Shoes) It's available in both numericPrevents Rounded Shoulders and Upper Back Strain Promotes Proper Posture and Shoulder Health Relieves Neck, Shoulder, and Upper Back Pain Enhances Body Alignment Through Sensory Stimulation Activates the Midfoot and Big Toe for Improved Stability Available in WIDE Model for Shoes with Larger Toe Boxes (Vivo, Xero Shoes, etc.)