Trinity is a wider version of the Halcyon at 155mm. We started by lowering the contact point of the mid saddle. Now Soft Tissue and the Perineum touch after nearly 1 inch of drop. The Trinity has black hollow titanium alloy rails, a moisture resistant cover and a foam membrane that provides the basis for our Comfort Surface. We widened the sit bone contact point to 155mm, along with cutting a very wide and forgiving channel in the sit area.