K'outure Ltd, formed less than a year ago in Grantown-on-Spey near Aviemore, is the brainchild of Harriet, 27, Matilda, 26, and Jemima Kirkwood, 24.
The sisters are all graduates of Edinburgh College of Art's performance costume department.
Johnston's of Elgin and Knockando Woolmill have also sponsored the firm.
Harriet said: "For a young company to receive the support of such iconic Scottish manufacturers so early on in its development is hugely exciting and we hope it is testament to the garments that K'outure are producing."
Their firm blends contemporary design with traditional fabrics, with the first collection called K'osy for K'outure. The sisters say they aim to make weirdness wearable with their unique designs.
Jemima said: "Having been trained in performance costume we take the odd, weird and sometimes downright baffling from our costume design work and prune it back to reveal the everyday and wearable, with some theatrical flair.
"We feel that our costume background equips us with the scope and vision to see further than the ever-changing trends of fashion, a challenge we relish every day."