Using a traditional open-coil design, the Queen Ortho Comfort mattress from Hyder Beds delivers exceptional support and comfort. The coils are made from high-tensile steel interlaced into a lattice formation. Because the steel is so strong you�re less likely to suffer from �sagging spring syndrome� over time! The mattress is 24cm deep, and in our opinion is definitely fit for a queen!It can be a real struggle for those who suffer from allergies when it comes to choosing the right mattress. The Queen Ortho Comfort mattress uses 100% polyester fillings and an open coil construction, making it a great option if you�re looking for an affordable, hypoallergenic mattress you can rely on. The Damask cover is made from woven, breathable fibres, making this an easy mattress to keep clean and healthy. The mattress can be flipped and turned regularly to extend its lifespan.The use of a 100% polyester soft white filling makes this mattress an absolute pleasure to snuggle up on at the end of the day. The polyester filling holds its form for longer and is less likely to compress over time, giving you more support and comfort in a hypoallergenic environment.Suffering from a bad back can make sleeping difficult, unless you�ve got the support you really need. The Queen Ortho Comfort Mattress lives up to its name by having a firmness rating of 4 (Medium to Firm), which means greater support for your back and shoulders, as well as alleviating those annoying �pressure points� along the body at the shoulders and lower back.The Queen Ortho is made in the UK to exacting standards, and has been examined and approved by the National Bed Federation (NBF). It�s also fire resistant and conforms to the BS7177: 2008 standard for domestic use (low hazard), making it an ideal choice for home use. To give you additional peace of mind, it comes with a full 1-year guarantee.