The NWT Lululemon Define Jacket in Size 10 Lunar Rock Luon is a rare find from 2018, featuring a nylon and elastane outer shell with a Luon fabric type. This slim-fit track jacket is designed for activewear, with features like thumbholes, cuffins, and secure front pockets, making it perfect for gym & training activities. With its four-way stretch, naturally breathable material, and quick recovery fabric, this mid-length jacket is ideal for winter, fall, and spring seasons, providing both style and functionality for active women.