reversible

Concise Oxford English Dictionary © 2008 Oxford University Press:
reversible/rɪˈvɜːsəbl/

▶adjective

• 1 able to be turned the other way round.

  ■ (of a garment or fabric) faced on both sides so as to be worn or used with either outside.

• 2 (of the effects of a process or condition) capable of being reversed so that the previous state is restored.

– derivatives
reversibility noun,
reversibly adverb.