Unfortunately, sliding is an issue for many topper owners. Some toppers are equipped with elastic loops to fit around the corners of your mattress, or “anti-slip” bottoms that provide traction and prevent excessive shifting. If a topper does not include these features, it may slide across your mattress during the night – especially if it’s on the lighter side.
Tucking the topper beneath a fitted sheet can mitigate this issue, as can covering the topper with a flat sheet and tucking its edges beneath your mattress. Also make sure the topper and mattress share the same size.