Casper vs Purple Mattress

Casper v Purple Mattress

Purple is one of the biggest names in the bed in a box market and is extremely popular across the US. But there are lots of other mattresses on the market, and one of these is Casper, who started making their mattress just before Purple. In this article we'll compare the two mattresses and discuss which one is best suited to your requirements.

Price and sizes

Casper and Purple both come in a small range of US sizes, with the biggest for both brands being a King / California King. The Casper is ever so slightly cheaper than the Purple mattress.


The two mattresses are constructed quite differently – Purple use a unique hyper-elastic polymer with poly foam, whereas the Casper has memory foam and poly foam. Let's have a look at the layers in more detail.


  • Cover – A two-tone white and grey cover, which is 100% polyester on top and a blend of polyester and polypropylene on the sides.
  • Top Layer – A 3cm layer of responsive and breathable poly foam, providing softness, cooling and bounce.
  • Second Layer – A 3cm layer of memory foam, designed to provide support, pressure relief and body contouring for the mattress.
  • Third Layer – A 3cm layer of transition poly foam to provide a transition from the top layers to the base foam.
  • Bottom Layer – A 12cm of high-density support foam to provide a breathable foundation.


  • Cover – A thin breathable cover made of a blend of polyester, viscose and lycra.
  • Top Layer – A 5cm comfort layer made of hyper-elastic polymer, set up in a grid structure to help with weight distribution and pressure relief. The air pockets that are created help to stop overheating while sleeping.
  • Second Layer – An 8cm layer of transition poly foam to provide compression support for the mattress.
  • Bottom Layer – A 10cm firm layer of poly foam to give the mattress its shape and act as its foundational support.

The Casper mattress is 24cm deep, whilst the Purple is 23cm.

Firmness, Comfort and Support

Both mattresses have a medium firmness rating, with the Casper perhaps being ever so slightly firmer. Let's look at the pros and cons of each mattress in this department.


  • The Casper does a good job of keeping sleepers cool and comfortable, whilst still providing comfort.
  • Softer top layers than some mattresses, meaning that there is a little more sinkage. Some sleepers will obviously prefer this!
  • Good support in all sleeping positions, but has much softer edge support than many mattresses.
  • Could feel unsupportive if you are of a heavier build.


  • The Purple is very bouncy and responds quickly to pressure.
  • High ability to distribute weight evenly, helping to avoid any build-up of pressure points.
  • Excellent edge support for a 'box' mattress, meaning you feel supported even at the edge of the bed.
  • Good support for all sleeping positions but performs particularly well for side sleepers.

Other Factors

Both mattresses offer a trial period of 100 nights, with a full refund if you're not satisfied. There's also a 10-year guarantee and free shipping to the continental US.

Which mattress is best for me?

Both mattresses offer appealing factors, but here are some points to consider when deciding which best meets your requirements.


We'd recommend this mattress if:

  • You don't mind a lack of edge support and aren't of a heavier build.
  • You want a medium firmness mattress, which provides good feel, comfort and support to most sleepers.
  • You want a mattress with little motion transfer.


We'd recommend this mattress if:

  • You want a mattress that keeps your temperature neutral throughout the night.
  • You sleep on your side, as the Purple is one of the best on the market for side sleepers.
  • You want good pressure relief and support.