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.

Free shipping
1 Year Warranty
30-Day Return
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.

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.

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.

For diagnosed coccydynia, a specialist ring cushion is more appropriate.

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: