Fleece
A synthetic fleece jacket is light, warm, and quick drying - any reasonably thick jacket of the type shown in the photo will do, and inexpensive models are just as good as the well known brands. Avoid Goretex Windstopper as it has the same membrane in it as a waterproof jacket and as such is equally sweaty without being very warm.
Alternatives include pile-pertex such as the Buffalo system (very functional but no marks for style), or any well insulated "soft shell" that doesn't have a membrane in it.
Suitable models: any thick synthetic fleece, or a Buffalo shirt.