Patent ID: 8726414

Claim:
An article of apparel comprising: a torso region having a front area, a back area, and a pair of side areas for covering a torso of a wearer, and the torso region having a neck opening and an opposite waist opening; and a pair of arm regions extending from the torso region for receiving arms of the wearer, the article of apparel being formed from at least a first material and a second material, the first material having: a back portion that is centrally-located in the back area of the torso region and extends in a vertical direction from the neck opening to the waist opening; and a pair of side portions that are located in the side areas of the torso region and extend in the vertical direction from the arm regions to the waist opening, the first material including a yarn that exhibits a dimensional transformation upon exposure to water, and the second material being different than the first material.