U.S. patent application 20190062614 (applicant Nike Inc., Beaverton, Ore.):
"A sole structure for an article of footwear includes a chamber having a first barrier element, a second barrier element, and a tensile member. The tensile member is disposed within an interior void defined by the first barrier element and the second barrier element. The sole structure further includes a phase change material [70, above] disposed within the interior void and operable between a first state in a first temperature range and a second state in a second temperature range. The first temperature range is from 30° C. to 35° C. and the second temperature range is from 35° C. to 42° C. The sole structure further includes an insulating member disposed between the chamber and a ground contacting surface."