1. most able to be stretched or extended without breaking; most elastic
Usage: superlative form of stretchy

Examples

• This is the stretchiest fabric in the store.
• The stretchiest rubber band broke when I pulled it too far.
• She chose the stretchiest yoga pants for her workout.
• Among all the materials tested, this polymer was the stretchiest.
• The stretchiest part of the exercise routine was the cool-down.
• This brand makes the stretchiest athletic wear available.