Adaptive vents

An article of apparel, the article of apparel comprising a textile comprising:

• a first layer comprising a first surface and a second surface opposite the first surface, the first surface defining a plane with a z-direction extending out of the plane;
• and
• a plurality of vent systems, each of the plurality of vent systems comprising:
• a slit comprising:
• a first end and a second end and extending through the first layer from the first surface to the second surface, the first end and the second end defining a longitudinal axis in an x-direction, and
• a first slit edge and a second slit edge opposite the first slit edge between the first end and the second end;
• and
• an adaptive structure affixed to the first surface of the textile, the adaptive structure comprising a first arm and a second arm connected at a base, the base positioned on a first side of the longitudinal axis, and a first end of the first arm and a second end of the second arm positioned on a second side of the longitudinal axis opposite the first side;
• wherein,
• when exposed to an external stimulus, the adaptive structure undergoes a shape change that causes the slit to transition from a closed state to an open state.

A textile comprising:

• a first layer comprising a first surface and a second surface opposite the first surface, the first surface defining a plane with a z-direction extending out of the plane;
• a slit comprising:
• a first end and a second end and extending through the first layer from the first surface to the second surface, the first end and the second end defining a longitudinal axis in an x-direction, and
• a first slit edge and a second slit edge opposite the first slit edge between the first end and the second end;
• and
• an adaptive structure affixed to the first surface of the textile,, the adaptive structure partially surrounding the slit,
• wherein:
• when exposed to moisture, the adaptive structure undergoes a shape change that causes the slit to transition from a less open state to a more open state;
• and
• during the transition, the first slit edge moves in the z-direction away from the second slit edge.