Comes From: Manufactured in the UK, and shipped from Yorkshire.
Cost: £599 for a double, £699 for a king
Trial Period: 365 nights, plus a forever warranty.
Construction: Adaptive cooling top layer, 7 zone supported base, smart memory foam, and pressure-relieving memory foam on a base that takes it up to a 25cm depth.
Nectar is the only mattress that promises a "forever warranty", compared with around 10 years from other brands. They claim this is because the mattress has a stronger base, guaranteeing it for the full life of the mattress by its original owner. It also benefits from its cooling layer, which should help minimise the "overheated" feeling some have experienced from foam mattresses. Finally, the 365 day trial period means you can try it for a whole year before deciding its not for you, though the company claims fewer than 3% of customers return it.