This vest is adjustable at the shoulders, chest and waist. Therefore, it will fit a large range of sizes. These measurements may help determine the best size for you.

• To measure the chest and waist circumference: First, wrap a soft measuring tape around the fullest part of your chest and under your armpits, making sure to keep the tape parallel to the ground. This determines your chest measurement. Then wrap a measuring tape around your natural waistline (usually across your belly button), making sure to keep the tape parallel to the ground. See where the larger of the two measurements fall on the size chart. Please note: If you think you are in between two sizes, order the next size up to accommodate the cooling packs.
• To measure the vest length: Hold the tape measure at the highest point of your shoulder. Look straight ahead and pull it down to your natural waist. Mark this measurement on the tape measure with your thumb. Please note: When in doubt, order the next size up to accommodate the cooling packs and to prevent the vest from looking too short.
• Please note: the weight range is simply a guide; there are many exceptions for different body types.

Our Customer Care team is here to answer product questions and provide additional details and measurements. Just give us a call at 1-800-763-8423 or send us an e-mail. We are happy to help!