Marie is wearing an intarsia cardigan by Thakoon Addition.
This colourful wool cardigan is now on sale at Net-a-porter :
Patchwork-intarsia wool-blend cardi-coat
You might find this same long-sleeved cardigan at farfetch, together with a sleeveless vest with the same pattern and a sweater in different colours :
THAKOON ADDITION mixed print cardigan / THAKOON ADDITION Vest cardigan
THAKOON ADDITION patchwork print sweater
(The cardigan is on sale, the vest and the sweater are not.)