Article of apparel with material elements having a reversible structure

An article of apparel, comprising:

• a first material element having a first substrate with a first surface and a second surface opposite the first surface, wherein the first material element has a first plurality of projections extending from the first surface, wherein the first substrate and the first plurality of projections are a unitary knitted construction and wherein each projection of the first plurality of projections includes a first terminal end and a first plurality of connecting fibers extending between the first terminal end and the first substrate;
• and
• a second material element having a second substrate with a third surface and a fourth surface opposite the third surface, wherein the third surface has a second plurality of projections extending from the third surface,
• wherein the second material element is positioned adjacent the first material element and joined to the first material element to define a seam between edges of the first material element and the second material element, wherein the first material element comprises an arm region of the article of apparel and the second material element comprises a torso region of the article of apparel,
• wherein the first plurality of projections has a first spacing between adjacent projections and the second plurality of projections has a second spacing between adjacent projections, wherein the second spacing is greater than the first spacing, and
• wherein the article of apparel is reversibly convertible between a first configuration and a second configuration, the first surface facing outward from the article of apparel in the first configuration, and the second surface facing outward from the article of apparel in the second configuration.

An article of apparel, comprising:

• a first material element having a first substrate with a first surface and a second surface opposite the first surface, the first material element having a first plurality of projections extending from the first surface, wherein the first substrate and the first plurality of projections are a unitary knitted construction, wherein each projection of the first plurality of projections includes a first terminal end and a first plurality of connecting fibers extending between the first terminal end and the first substrate, and wherein each projection of the first plurality of projections has a first height defined by a first distance from the first terminal end and the first substrate, and
• a second material element having a second substrate with a third surface and a fourth surface opposite the third surface, the third surface having a second plurality of projections extending from the third surface, wherein each projection of the second plurality of projections includes a second terminal end and a second plurality of connecting fibers extending between the second terminal end and the third surface, and wherein each projection of the second plurality of projections has a second height defined by a second distance from the second terminal end and the third surface, wherein the first height is less than the second height,
• wherein the second material element is positioned adjacent the first material element and joined to the first material element to define a seam between edges of the first material element and the second material element, and
• wherein the article of apparel is reversibly convertible between a first configuration and a second configuration, the first surface facing outward from the article of apparel in the first configuration, and the second surface facing outward from the article of apparel in the second configuration, wherein the seam between edges of the first material element and the second material element is structured to exhibit a finished structure in both the first configuration and the second configuration.