All mattress materials come in a variety of firmness levels, so you could theoretically have any mattress material you want because you can get it in the mattress firmness that’s right for you. However, if you want the best material for the average lightweight sleeper, we’d suggest memory foam.
Memory foam offers petite sleepers the most pressure relief because it’s the most contouring material. It will compress underneath your pressure points to both align your spine and relieve your shoulders and hips at the same time. That makes memory foam a step above other materials for petite sleepers.