Apparel with ultrasonic position sensing and haptic feedback for activities

An article of apparel, comprising:

• a fabric configured to conform to a body of a wearer;
• a plurality of positioning sensors secured with respect to the fabric at a first set of predetermined locations, each of the positioning sensors configured to:
• emit a first signal that is configured to be detected by one or more of the plurality of positioning sensors, and
• output a second signal indicative of having emitted or detected the first signal, the second signal indicative of having detected the first signal including an indication of a direction from which the first signal was detected;
• a plurality of feedback devices secured with respect to the fabric at a second set of predetermined locations, each of the feedback devices configured to output a feedback signal configured to be detectable by the wearer of the article of apparel;
• and
• a processor is configured to:
• determine positional values and directional values of the plurality of positioning sensors based, at least in part, on the second signal output by the plurality of positioning sensors;
• and
• cause at least some of the plurality of feedback devices to output the feedback signal based, at least in part, on a difference between the positional values and the directional values.