Supermodel, "Project Runway" star, and fashion entrepreneur Heidi Klum. Photo: Henry S. Dziekan III, Getty Images

Heidi Klum only designs to fill a need.

After the successful launch of her much-needed maternity lines with Pea in the Pod and Motherhood Maternity, Klum's taking the next step and designing a collection of clothing inspired by moms for New Balance.

"I started thinking about what we need," Klum told StyleList at a celebration for her City magazine cover in New York. "I love practical things and I've been going to (drop my kids off at) school for three years now.

What we need is not necessarily sweat pants that are drab and not cool. It is too early in the morning to squeeze into tight pants. You don't want to wear business attire yet because you have things to do in between school and work."

"I wanted to do something that looks like you might be going to the gym," Klum continued, but "you don't have to work out in these clothes. You look athletic and fit, like you're a mover and a shaker. You don't look sloppy, crunchy granola."

Heidi Klum for New Balance will include haute tunics, knits, woven tops, leggings, and outerwear that incorporate cottons and silks, hand-woven stitching, and intricate details.

Pieces from the collection will retail from $32 to $168 and will be available in the United States, United Kingdom, Germany, and Japan beginning Oct. 7 exclusively on Amazon.

"I have great ponchos and leggings and cute sweatshirts -- it will grow into other things, but I can't talk about that yet," Klum added. "I feel like I found a good in-between solution."

In related news, check out the "Project Runway" finale fashion show during New York Fashion Week.