Look good and feel great with our Zipper Vest with Cool58 Phase Change Packs, now available in Light Blue and Pink!! This comfortable vest uses individual, smaller 4.5" x 6" Cool58 cooling packs which allows the quantity and location of the packs to be easily adjusted for a lightweight vest. Additional pack sets are offered at a special discount when purchased with the vest! Your choice of an extra set of Cool58 58� Fahrenheit phase change packs, which are ideal when freezers aren't available, or a set of Kool Max frozen water-based packs. You may want to order a set of each type of pack for flexibility on-the-go! See the full comparison of cooling pack technologies below in "How does it work?" Features: Adjustable, Custom Fit: It is important for cooling vests to fit snug to the body for optimal cooling. This cooling vest has adjustable hook and loop straps at the chest, waist and shoulders for a snug, comfortable and customized fit. Convenient And Easy To Wear: Once the cooling vest has been adjusted for size, it is easy to put on every time with the zipper-pull front. The clean design (with no logos or visible pack pockets!) is available in several sizes. Wear the vest over clothing or discreetly underneath. Comfortable 100% Cotton: The cooling vest shell is constructed of durable and machine washable 100% cotton twill. Cool58 Cooling Packs: Cool58 cooling packs freeze solid at a moderate and comfortable temperature of 58� Fahrenheit, so they can be activated in a freezer, refrigerator, or even a bucket of ice water. These reusable packs deliver comfortable cooling for up to 2-3 hours. (Please note: cooling times are estimates and will vary depending on climate, body metabolism and activity.) The different vest sizes include eight (8) to twelve (12) 4.5" x 6" packs. See the size chart for more information. Insulated Pack Pockets: Packs fit into insulated pockets inside the cooling vest. The pockets have a comfortable all-cotton fabric to protect the skin and a