Initially, the Leesa mattress was made using a foam known as AvenaTM foam. This was also a latex-like high resilience foam, but Leesa has changed it for 2022:  The top comfort layer is now made using a similar foam known as LSA200TM.  This gives a plusher feel to the mattress than Avena, although we cannot say how it is made for legal reasons. It has similar properties to latex only it is cooler and more resilient with better spring or bounce. LSA200TM foam is not only more comfortable, but provides better pressure relief than the AvenaTM foam. It contours to your body shape more quickly, and the Leesa mattress now has more comfort and pressure relief than before. It is also better for side sleepers than the original mattress. It is also more durable than the AvenaTM version.  The change was made in September 2018. It feels like latex, but has greater tear resistance than latex.