Final answer:
Coco Chanel is the designer renowned for her innovative use of wool jersey in the 1920s, which significantly transformed women's fashion by offering comfort and practicality.
Step-by-step explanation:
The designer known for the use of wool jersey in the 1920s was none other than Coco Chanel. Chanel revolutionized women's fashion during the early 20th century, and her introduction of wool jersey was a game-changer. This fabric was previously utilized for men's underwear, but Chanel saw its potential for comfortable and practical women's clothing.
It allowed her to create elegant and simple designs that not only flattered the female form but also provided unprecedented comfort and ease of movement. Her use of wool jersey contributed to the relaxation of the strictures of women's clothing at the time, making it a significant development in fashion history.
The references to Gunta Stölzl and Otti Berger, although important figures in textile art and the Bauhaus movement, do not relate to this specific question. It is Coco Chanel who is particularly noted for bringing wool jersey into high fashion during the 1920s.