This particular chasuble is filled with imagery related to Pentecost as it is described in the Acts of the Apostles:
When the day of Pentecost had come, they were all together in one place. And suddenly a sound came from heaven like the rush of a mighty wind, and it filled all the house where they were sitting. And there appeared to them tongues as of fire, distributed and resting on each one of them. And they were all filled with the Holy Spirit... (Acts 2:1-4)
Turning to the symbols found on the chasuble then, it of course includes the dove, the primary symbolic depiction assigned to the Holy Spirit, as well as clouds, meant to represent the strong winds, and finally flames depicting the tongues of fire that came to rest upon the Apostles and disciples.
Also included within the design are the familiar IHS monogram of the Jesuits, representing Christ, and another lower down, MAR, with a crown and the Immaculate Heart, pierced by a sword, representing the Virgin Mary.
As with the Alleluia chasuble, the Pentecost chasuble once again includes references to the Jesuits and to Helen of Wintour and her family -- details that, within the political climate of England at the time, were risky and bold inclusions. The back includes the Wintour family arms and motto, while the front includes her initials, H.W.. The Jesuit motto, A.M.D.G -- Ad Majorem Dei Gloriam -- also finds a place in the design.
The following short video will provide you with some further looks and information around the chasuble, including the fact that along with precious gemstones, it also originally included an embedded relic -- a rather unique feature.