3-in-1 Wedge
3-in-1 Wedge
3-in-1 Wedge™ by Fullmove
Adjustable ergonomic seat wedge for better posture
Customised comfort. Clinically-informed. Fully adaptable.
The 3-in-1 Wedge™ by Fullmove is an adjustable ergonomic seat wedge designed to improve posture, reduce spinal load, and allow comfortable sitting in office chairs and at home.
Shipping $8
One-year warranty
Payment plan available
Why seat angle matters
Your sitting position makes a big difference.
Most chairs keep your hips at a 90° angle. This position rotates the pelvis backward, flattens the lumbar curve, and increases passive loading on the spine.
Over time this slumped posture contributes to back pain, muscle fatigue, and discomfort — especially in prolonged sitting.
A forward-tilted seat wedge improves pelvic alignment so your spine can stay naturally upright.
Over time this slumped posture contributes to back pain, muscle fatigue, and discomfort — especially in prolonged sitting.
A forward-tilted seat wedge improves pelvic alignment so your spine can stay naturally upright.
What the research shows
Clinical trials have found that seat wedges angled between 8° and 13° as the most effective range for reducing back pain.
Our own trials have shown that when back pain is not present a 5° angle improves sitting posture.
Our own trials have shown that when back pain is not present a 5° angle improves sitting posture.
Why we avoid tailbone (Coccyx) cut-outs
Some wedges feature a tailbone cut-out — we don’t, and here’s why:
- In good posture, the tailbone doesn’t touch the seat.
- Coccyx pain usually stems from poor posture, injury, or referred pain — not direct pressure.
- Cut-outs weaken the wedge and reduce rear support.
Engineered for real support
The 3-in-1 Wedge by Fullmove uses high-density foam like that in premium seating (not soft memory foam that flattens) to support your weight and maintain a consistent wedge angle.
Features include:
Features include:
- High-density supportive foam
- 3D breathable mesh cover
- Non-slip base to stabilise the stacked layers
- Modular design so you can adjust angles easily
How to use 3-in-1 Wedge™
Simple and effective.
- Start with the angle that feels best for your current comfort level.
- Use different combinations in different chairs or situations.
- Stack and adjust as needed—you're in control.
Product specs
- 3 in 1 Wedge™: model No.2025Y11
- Colour: Onyx Black
- Dimensions: 410W x 380D x 40 or 60H mm
- Net weight: 1025gms
- Core material: Dual density PU foam
- Cover: 3D mesh upper, anti-slip base, removable, machine/hand wash
Free Shipping for orders over $120
Shipped from Wellington, NZ Post 1-2 day delivery.
One-year warranty
Designed and made with quality materials: one-year warranty on parts and workmanship.
30-day return
Buy with confidence with our relief-or-return promise. If you don’t get the relief you need, return for a full refund.
Ready to sit smarter?
Support your posture. Protect your spine. Choose comfort that adapts with you.
Discover the 3-in-1 Wedge™ by Fullmove — the adjustable ergonomic seat wedge for people who want control over their posture.
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