We spent hundreds of hours testing strap tension, padding and fit before settling on this design, and we kept adjusting it until it did the one thing it needs to do — hold your shoulders in the right position without you having to think about it.

It works by cueing you upright rather than locking you there, so the change comes from the habit you build while wearing it. If it doesn't do that for you, send it back within 30 days and we'll refund you.

Most people notice their shoulders sitting further back within two to three weeks of daily wear. It trains the habit rather than forcing the position, so it is gradual by design.

Once you are used to it, yes. Build up to it though — start at 20 to 30 minutes a day for the first week.

Going straight to a full day usually makes your upper back ache, because the muscles holding that position are not used to the work yet. That is not the brace being wrong, it is just those muscles waking up.

Yes. Cold wash on a gentle cycle, ideally in a laundry bag so the straps do not tangle, then leave it to air dry.

Do not tumble dry it. The heat breaks down the elastic and the brace loses its tension.

Under a normal shirt, jumper or hoodie, no. Under something very thin or tight-fitting you may be able to make out the strap line across the shoulders.

Measure around your chest, under the arms, and check that against the sizing chart on this page. If you fall between two sizes, go up — the straps adjust down, but they will not stretch past their maximum.

Get in touch and we will sort out a different size. You have 30 days from delivery.

Keep the packaging if you can, and let us know your chest measurement when you message — it makes getting the replacement right first time much easier.