Neiman Marcus is doubling down on the Jenner girls and their Kendall + Kylie collection, first with the contemporary line's debut spring 2016 collection, which the Dallas-based retailer is selling, and also with an exclusive, elevated nine-piece collection, part of the #OnlyatNM program.

Inspired by favorite vintage pieces and their current closets, the sisters created the nine pieces in an effort to bring shoppers one step closer to emulating their much-documented personal styles.

Pieces include a long, red cutout dress retailing for $575 and a black-and-white striped V-neck wrap top for $245. Other items include a black silk jumpsuit and leather short, allowing the sisters to use finer fabrics and details than in their regular line.

This is the sister's most elevated fashion project to date. In 2012, they launched a junior's collection with PacSun and in 2015 theycollaborated with Topshop to create a series of California-inspired capsule collections. Hoping to develop a more mature image in the fashion world, they launched the Kendall + Kylie ready-to-wear and shoe collections for spring in major department and specialty stores.

The clothing ranges from $200 to $1,000 in price and is availables in Neiman Marcus stores since April 7.