The Arctic Heat cool vest is ideal for people who require a lightweight cooling vest. This Ice vest is suitable for athletes, team sports, people with MS Multiple Sclerosis, industrial workers, and can be used underneath clothing. A firm fit is best. Should be worn against the skin, or very close to the skin. Lightweight — from 1kg Constructed with quality cooling materials Can be re-cooled in minutes Available in many sizes — Extra Small to 5XL Lowers skin temperature Can also be heated in winter Works in hot and humid conditions Will stay cold for up to 2 hours May improve performance Please choose the correct size. The cooling vest should be a firm fit. Measured around the chest. If you are in-between sizes we recommend the smaller size. Sizing Chart — Chest measurement XXS — 80cm | XS — 85cm | S — 90cm | M — 95cm | L — 100cm | XL — 105cm | 2XL — 110cm | 3XL — 115cm | 4XL — 120cm | 5XL — 125cm View cooling vest instructions