fendue sur la tranche

French to English Marketing Textiles / Clothing / Fashion

Draps de laine double face
Matière première travaillée en double épaisseur, fendue sur la tranche pour être assemblée sans couture visible ni doublure.

I think I understand what they mean, the cloth is split and then reassembled but I haven't been able to find the exact English (UK) term for this. The text is from a top of the range ready-to-wear brand lookbook.

Any help gratefully received.