Reversible or transformable refers to an object or system that can change its form or state and then return to its original state. This concept is often seen in materials like thermoplastics, which can be heated to reshape and then cooled to harden again. It also applies to certain processes in chemistry, where reactions can proceed in both directions. In design, reversible items, such as clothing or furniture, can serve multiple purposes. For example, a reversible jacket can be worn inside out for a different look. This versatility makes reversible products practical and appealing for consumers seeking functionality and style.