elastic
e-las-tic
noun
A stretchy material, often a cord or fabric, used for fastening.
"My trousers have elastic in the waistband."
adjective
Able to stretch and return to its original shape easily.
"The elastic band snapped back quickly."
Thesaurus
Synonyms: flexible, pliable, adaptable, pliant, bouncy, springlike, stretchable, whippy, rubbery, elasticized, resilient, fictile
Antonyms: inelastic