Tweak’s founder lived with a sleep disorder for 10 years,which inspired him to develop a completely different mattress to those already on the market. And Tweak’s mattress is very different – it come with multiple inserts, which you can ‘tweak’ to your own specifications. The Tweak mattress is completely customisable, with five separate zones that can be adjusted for sleeping requirements. Tweak is different to many mattress in a box brands, using reactive foam and inserts to guarantee every sleeper can find their perfect match.