Hi Sara

Thanks for your question.

In the Origins range you could look at the Origins Reflex, which has a medium spring which is the correct support level for your body weights, but it has the firmer feel upholstery top layers.

In the Artisan range you could look at the Artisan 1500 in a medium tension spring. This model has a slightly firmer feel than a medium in the top upholstery layers, but does contain 53% natural fibres.

Either of these mattresses would give you both plenty of support for your bad back, at your body weights, but also be comfortable at the same time.

If you require any further assistance please call the office on 0161 437 4419.

Regards Gary