Dry is good the castelli pro issue sleeveless baselayer is the piece the pros requested for those inbetween conditions where the flanders is too warm and the core mesh is too cool like spain in february or belgium in april youre not looking for warmth from your base layer just something to move the moisture away from your body and help your race jersey perform castellis 3d mesh fabric creates dead air space next to your skin while the polyester capillary action moves sweat away