The designers are asked to create something fashionable and easy to move in, but also appropriate for a pregnant woman to wear out in public, for supermodel Rebecca Romijn. They have $100 and two days to complete the look.

20 new designers audition in front of Heidi, Tim, Michael, and Nina. The judges then pare the group down to the 16 contestants of season 9. The next morning, the designers are given the challenge of transforming a bed sheet and the pajamas they are wearing into an outfit of their choice. They have one day to complete their garments.

The designers are paired up into teams of two and must create outfits for professional stilt-walkers. They have $500 and one day to complete their garments.

The designers must create a look for Nina Garcia that she can wear to work in the day and to an industry event at night. They have $200 and one day to complete the challenge.

It’s the halfway point and the designers are hitting the road to a denim explosion; in a throwback challenge, they’ll create all denim looks while competing in head-to-head battles where only one designer can be safe from elimination.

The designers are tasked to create an outfit using materials found at a pet supply store. They have $300 and one day to complete their looks.

After a race to determine team leaders, the designers are split into groups of three. The challenge is to create three looks to wear with sneakers from Heidi Klum's new line for New Balance. The winning look will be sold as part of this collection on Amazon. They have $300 and one day to complete their outfits.

The designers are each paired to a young art student with whom they must create a painting. The challenge is to design an avant-garde look using that art piece as their inspiration. They have $300 and two days to complete their looks.

The designers are split into two opposing teams to create a five-look mini-collection. They must also design their own fabrics and create a multimedia fashion show to showcase their looks. They have two days to create their garments.

The designers must create a new look for their client's significant other. They have $200 and two days to complete their outfits.

Split into two teams, the designers are asked to create outfits for up-and-coming band The Sheepdogs. They have $300 and two days to complete their looks.

After being paired up, the designers must create a high-fashion runway look inspired by birds (an owl, a raven, a cockatoo, and an Amazon parrot). However, the pairing are not meant to be teams but will instead be competing head-to-head. Later, they are asked to create a second complimentary outfit. They have $600 and two days to complete the challenge.

The designers must create a three-piece mini-collection showcasing their range, using New York's Governor's Island as inspiration. They have $500 and two days to complete the challenge.

Eighteen designers have made it through the application stage, but the judges need to pare down the group to fifteen contestants. Later in the workroom, they learn that a designer from a previous season will join them. For their first challenge, the designers are asked to create a Spring look from the provided fabrics that will give the judges a preview of their Fashion Week collections. They have one day to complete the challenge.

Working in teams of three, the designers must create a mini-collection of fashionable looks out of items found in a movie theater or film set. They have one day to complete the challenge.

The designers must draw from their past to inspire a look they think will be relevant 20 years into the future. They have $200 and one day to complete the challenge.

The designers are each assigned a man's vintage suit which will serve as the materials and inspiration for a high fashion look. They have $100 for supplemental fabric and one day to complete the challenge.

The designers are challenged to create an avant-garde look that must be able to withstand the water elements of Project Runway's first "rain"-way. They have $300 and two days to complete their garments.

16 new designers arrive in New York City to compete to be the 14th winner of Project Runway. At Madison Square Garden, they have three minutes to find the fabric they will use to create a look that shows who they are as a designer. They have one day to complete the challenge.

16 new designers arrive in New York with an eye to being named champion of Project Runway's 15th season. At the launch party, they are given their first challenge: use the party's spirit, aura, and vibe as inspiration (and the decorations as materials) for an outfit of their choosing. They have one day to complete their looks.

The designers must create an outfit to flatter all body types, with the winning look to be sold by JustFab.com. They have $150 and one day to complete the challenge.

The designers are asked to create an avant-garde look inspired by Shopkins Shoppies characters. They have $300 and one day to complete the challenge.

The contestants must create their own fabric designs for a look to be inspired by a moment from their past. They have $100 for supplemental fabric and two days to complete their garments.

In the conclusion of the finale, the remaining contestants ready their collections for the runway. They have $300 and four days to finish their looks. Then they present their lines to industry insiders and the judges in order to be crowned the winner.

With the models as their clients, the designers are asked to create a street style look for them. They have $200 and one day to complete the challenge.