The client is already familiar with the short description and its structure, so it is preferable to provide more details about the points which you have already mentioned. You can add technical documentation/more information about the material through text, standard videos/360 degree review and/or photos. The customer is already at the product page, considering buying the item and he should be able to interpret all information effortlessly. It is recommended to not use more than two fonts.
The option for additional tabs allows you to divide the information in sections. You can add a separate tab for each distinguishing product element and explain how it contributes to its overall quality. Depending on the product, the tabs can also provide laundry tips or other information.