A reversible topper offers a soft layer of memory foam as well as a supportive layer of memory foam. The two layers will vary in foam type, foam grade and may even be different thicknesses. The two layers will be fused together to allow the consumer to flip the topper and decide which layer is the more comfortable to sleep on. There is no “right side” to sleep on this style of topper. It is your comfort preference. Since comfort is very subjective to the user, we recommend sleeping on either side for a night or two to help you decide which side is more comfortable for you to sleep on and take it from there.