This is a lightweight, water-repellent 2-way stretch down jacket. It's a very popular item, and the 4L size sells out immediately. You can layer clothes underneath if you get the 4L size. It's very warm. Workman 2026 Model, Latest Model - Brand: FieldCore - Size: 4L - Color: Black - Model Name: AERO STRETCH ULTIMATE - Features: Waterproof, 2-way stretch, Lightweight Ships the same day. No comments needed, instant purchase is OK! Down Padding