Rapha says "A visible, warm garment for long rides where versatility is paramount" so I presume the warm bit means it is thicker than a standard jersey but haven't seen them side-by-side.
If it helps, I wore mine today with a merino sleeveless base and a brevet gilet today and I was toasty. Not remotely cold.
@JB started
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Rapha says "A visible, warm garment for long rides where versatility is paramount" so I presume the warm bit means it is thicker than a standard jersey but haven't seen them side-by-side.