You CAN use standard polyester upholstery batting to wrap your latex foam. In this case either a ticking fabric or a heavy cover fabric (such as leather) is recommended to protect the foam from light. Latex foam breaks down quickly when exposed to light – especially UV light, though I’ve seen evidence that indoor fluorescent and incandescent lighting can be detrimental as well. The wool batting and the ticking fabric each provides a measure of protection, and the two combined will help keep your latex foam soft and long-lasting.
Note: using no batting at all is not recommended as it will result in faster breakdown of your foam due to increased abrasion between the cover fabric and foam.