Stretchy elastic seems to be a trick question for a quiz given in Econ at UP - stretchy elastic is the band around your stomach on a pair of sweats. Good luck out there.
it is stretchy
yes.......................it is a stretchy elastic rubber band
elastic
flexible, springy, stretchy, plastic
elastic connective tissue
they are elastic and stretchy
a stretchy clause
elastic (a stretchy string)
Yes, polyester can be elastic. It can be combined with other fibers like spandex to create a stretchy fabric that has elasticity.
Something that can get longer than it's original size
the "stretchy stuff" at the bottom of jackets, and on the top of underwear, the cuffs of some jumpers, etc. is called elastic
Materials (i assume you mean clothes of fabrics) are stretchy due to the amount of elastic in the fabric. More elastic means stretchier fabric, less elastic means it will not be as stretchy.