This is a Lululemon Define Jacket in the size 0, with a heathered gray pattern. It features the brand’s signature slim fit, thumbholes on the cuffs, zippered pockets, and a high collar for a sleek and functional design. The jacket is made from soft and stretchy fabric, likely Lululemon’s signature “Nulu” or “Luon” material, which provides comfort and flexibility, perfect for light activities or layering.