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.

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.

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 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.

Working in pairs, the designers must use men's fabrics and styles to create a fashion-forward Fall outfit for their female models. They have $100 per team for supplemental fabric and one day to complete the challenge.

In the conclusion of the finale, the remaining contestants ready their collections for the runway. Then they present their lines to industry insiders at Fashion Week.

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 runway is converted into a Winter Wonderland as the designers are tasked with creating a winter-themed look. They have $400 and two days to complete the challenge.

For this unconventional challenge, the designers are asked to create an elegant cocktail dress using materials from an actual cocktail bar. They have two days to complete their looks.

The jockstrap is back; the all-stars must create high-fashion looks featuring couture undergarments in this one-day challenge; fashion icons Sergio Hudson and Paulina Porizkova help separate the hot from the not.

In the conclusion of the finale, the remaining contestants ready their collections for the runway. Then they present their lines to industry insiders at Fashion Week.

The designers are tasked with creating modern, age-appropriate looks for a young girl based on the BeForever line of American Girl dolls. They have $150 and 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 are asked to create a look that transitions from daylight to blacklight on the runway. They have $200 and one day to complete their garments.

The designers are tasked to create an avant-garde look using conventional fabric and unconventional metal materials. They have $150 and two days to complete the challenge.

In three teams, the designers are asked to create a high fashion, five-look collection out of recycled materials. They have one day to complete the challenge.

The designers must create looks inspired by "Warrior Women" — women who have battled breast cancer. They have $250 and two days to complete the challenge.

The all-stars are tasked with creating a runway look using toys for FAO Schwarz.

For the first time, the final seven designers are given the freedom to design whatever they want; on the grand outdoor runway of Franklin D. Roosevelt Four Freedoms State Park, their daring "freedom looks" will be unveiled, rain or shine.

In teams of three, the designers are tasked to create two cohesive looks for fall including outerwear. But first they must sell handmade goods to people on the street to earn money for fabrics at Mood. They have one day to complete their garments.

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.

Using New York City bridges (Queensboro, Manhattan, and Brooklyn) as inspiration, the designers must use 3D printing technology to create avant-garde looks. They have $200 and two days to complete the challenge.

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.