Flexible, precision-engineered orthotic support for patients requiring gentle control.

The Interpod Vari-Force Low Stiffness Orthotic is designed for patients with low supination resistance or increased forefoot stiffness, offering adaptive support that promotes natural foot motion while maintaining biomechanical alignment. Built from durable polypropylene, this low-force model provides responsive flexibility, making it ideal for use in clinical orthotic prescriptions that prioritise comfort and movement efficiency.

Part of the Interpod Vari-Force Orthotic Library, this device enables podiatrists to tailor stiffness precisely to the patient’s biomechanical needs — delivering the minimal effective support to reduce symptoms and optimise gait performance.

Key Features

• Low Stiffness Polypropylene Shell: Offers a flexible, lightweight foundation that supports natural foot mechanics.
• Customisable Support: Allows practitioners to prescribe the minimal level of force needed for effective correction.
• Forefoot Mobility Assistance: Facilitates rotation about the fifth metatarsal, improving function and comfort.
• Soft Heel Lift Compatibility: Can be paired with a soft heel lift to reduce the speed of centre of pressure progression.
• Clinically Proven Design: Developed using supination resistance testing for predictable, evidence-based outcomes.

How It Works

The Low Stiffness Vari-Force model supports efficient forefoot motion, assisting the foot in rotating about the fifth metatarsal to produce a higher GIB (Gastroc-Instep-Bunion) test result. By reducing orthotic rigidity, it maintains control while minimising restriction — ideal for patients with flexible feet, lower arch profiles, or sensitivity to stiffer orthotic devices.

Benefits

• Precise Support: Matches stiffness to patient biomechanics for natural alignment and comfort.
• Predictive Assessment: Supination resistance testing (via the Keystone Device) allows for accurate, data-driven prescriptions.
• Reduced Injury Risk: Designed to respond to foot movement dynamically, decreasing strain on surrounding joints and soft tissues.
• Improved Patient Tolerance: Ideal for first-time orthotic users or those sensitive to firm devices.

Design Features

• Three material options: NeuroFlex, Polyurethane, EVA
• Three stiffness levels available across the Vari-Force range: Low, Moderate, High
• Control zones: Midfoot and/or Rearfoot for targeted biomechanical correction
• Shank-dependent or independent models
• Cuboid notch for enhanced lateral stability
• Heel cup variations for increased comfort and fit
• Extrinsic and intrinsic rearfoot posting options
• Core additions: PMP pads, lateral pads, heel lifts
• Rearfoot wedging: 0° or 6° options
• 1st ray cut-out and plantar fascial groove for optimal forefoot accommodation
• 1st ray declination for improved propulsion

Common Clinical Uses

• Low supination resistance: Ideal for patients requiring gentle control without excessive rigidity.
• Forefoot stiffness management: Encourages smoother motion across the metatarsal heads.
• Custom orthotic prescriptions: Enables podiatrists to tailor stiffness precisely for each patient.
• Gait efficiency improvement: Helps balance foot motion and pressure distribution in everyday use.

Who It’s For

• Podiatrists and orthotists seeking a low-force orthotic for flexible or sensitive feet.
• Active individuals who need lightweight, dynamic support.
• Rehabilitation patients transitioning to orthotic therapy.

Sold in pairs.

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The Interpod Vari-Force Low Stiffness Orthotic — designed for flexible feet that need precise, comfortable control without compromise.