The Ultralight Vest, our lightest-weight down Vest, uses cotton fibre in a slim silhouette for thermal efficiency.Lightweight-Great for travelling, easy to pack away and ideal for active use. Be it a cold spring afternoon or a chilly autumn evening, you will enjoy the warmth this provides. Item Type: Down Vest Gender:Men Style: Casual/business Material: Shell: 100% Nylon+ Neri: 90% White Duck Down Length:Short Size: US XS-L Measurements(Inches) Noted: The sizes come in US size. All conversions are approximate. Fits may vary by style or personal preference; sizes may vary by manufacturer. US S (Tag 170): Chest-42.5" Shoulder-16.1 " Length-26.8" US M (Tag 175): Chest-44.1" Shoulder-16.5 " Length-27.1" US L (Tag 180): Chest-47.5" Shoulder-16.9 " Length-28.0" US XL (Tag 185): Chest-48.0" Shoulder-18.1 " Length-29.1"