What iconic item did Uniqlo popularize through its collaborations?

Uniqlo is well-known for its innovative approach to apparel, and one of the most iconic items that the brand popularized is the ultra-light down jacket. This jacket stands out due to its remarkable combination of warmth, lightweight materials, and packability, making it highly functional for a variety of weather conditions.

Through collaborations with renowned designers and brands, Uniqlo introduced stylish and accessible versions of the ultra-light down jacket, which resonated with a wide audience, thereby enhancing its visibility and popularity in the fashion market. This item exemplifies Uniqlo's ability to blend practicality with fashion-forward designs, setting it apart from other outerwear options that may not offer the same level of convenience and appeal.

The other options, such as the denim jacket, puffer vest, and trench coat, while each iconic in their own right, do not have the same association with Uniqlo's collaborative efforts or its brand identity as the ultra-light down jacket does.