APPAREL HAVING DYNAMIC VENT-SLIT STRUCTURE

An upper body article incorporating a dynamic vent-slit structure is provided. The article includes a torso portion adapted to extend around at least a portion of a wearer's torso in an as-worn position, and a plurality of slits arranged in a repeating fashion, wherein a spacing between two adjacent slits in linear alignment is less than a length of a slit in non-linear alignment with the two slits and that is offset from the two slits such that the slit in non-linear alignment overlies the spacing between the slits in linear alignment, and the slit in non-linear alignment is parallel to the slits in linear alignment. The slits may be positioned in one or more groupings, or aligned in different directions to open in response to different directions of stretch or movement, to provide dynamic venting of the article.