JACKET#61 - RIDGED LINEN WOOL EGGPLANT/INDIGO by Jan-Jan Van Essche from PROJECT#13 - REVERENCE (AW25).

JACKET WITH HIGH, STANDING COLLAR AND FRONT PLEAT.
FULLY LINED. 
THIS CORDUROY-LIKE FABRIC IS MADE UP OF A DENSE AND TEXTURED BROWN WOOL AND CASHMERE FRONT, WITH A SPARSELY WOVEN BACKING OF LINEN THREADS IN BLUE. AS THE FABRIC MOVES, HINTS OF INDIGO-TONED BLUE PIERCE THROUGH WITH ITS SHEEN.

You can find more information here.