Portwest S548 Hi-Vis Carbon Fibre Heated Tunnel JacketCombining hi-visibility functionality with stain, oil, grease, dirt and water repellent fabric comes the Portwest S548 Hi-Vis Carbon Fibre Heated Tunnel Jacket. With the help of carbon fibre heated panels literally embedded into its padded fabric, the S5548 uses a button controller located on the chest to control up to three different heat settings.Which Size is Right For Me?Working long hours wearing a single piece of protective clothing can be tough. Wearing the wrong size or fit makes that even harder. Thankfully, finding the right size for you couldn't be easier. Simply measure the circumference of your chest and waist before consulting the sizing chart below. If your measurement puts you on a sizing boundary, we recommend you select a size up for maximum warmth, comfortability and flexibility.  Size Chest Circumference (cm) Waist Circumference (cm) Small 92 - 96cm 76 - 80cm Medium 100 - 104cm 84 - 88cm Large 108 - 112cm 92 - 96cm Extra Large 116 - 124cm 100 - 104cm XX-Large 128 - 132cm 108 - 112cm Key Features and Benefits Equipped with carbon fibre heated panels controlled by a button located in the chest area Three different heat settings give the user a range of different temperature choices Elasticated cuffs aid in keeping wind and rain out the jacket  Stylish tunnel puffer design Hi-vis design keeps you seen and safe at all times via waist, stomach, elbow and forearm concave visibility strips EN 20471 certified high-visibility safety jacket Detachable hood for use in and out of rain Incredible 10 hour battery life is ideal for those working long shifts outdoors during winter Four pockets provide ample storage Chin guard with internal storm flap guards against rain and wind Grease, oil, water and, dirt repellent fabric shell Available in five different sizesHow Do I Wash a Heated Jacket?This jacket is certified safe after 25 washes. Please make sure to remove the battery pack before washing.How Does the S548 Work?The S548 is a tunnel jacket that uses embedded carbon fibre heated panels to heat the jacket in order to keep the user warm. The jacket has three heat settings that are controlled by a button at the chest. The rechargeable battery offers up to an incredible 10 hours of heat. Waterproof FabricThe S548 has a thermoplastic polyurethane (TPU) shell which protects it against water. TPU is a flexible, repellent compound that works like a thin plastic barrier. Instead of absorbing into a porous fabric, a TPU coating causes water to simply run off a jacket. It is a lightweight compound that covers the entire jacket without restricting flexibility or movement. Is Wearing a Heated Jacket Dangerous?It is natural to question the safety of a waterproof jacket that contains a battery as electricity and water don't mix well. However, the Portwest S548 has a number of features intended to put your mind at ease. Firstly, the jacket is waterproof thanks to a thermoplastic polyurethane coating that ensures water cannot penetrate the jacket to come into contact with the battery. Secondly,  the carbon fibre heated panels are protected by the tunnelling fabric which is 260g 100% polyester. In the event that water does enter the jacket, we recommend you disconnect the battery pack immediately. How Do You Charge This Jacket?The carbon fibre heated panels in the Portwest S548 are powered by a single rechargeable battery pack. Simply plug the pack in, charge and reuse as much as is required. 24/7 VisibilityThe S548 Jacket is EN certified as a high-visibility workwear jacket. HiVisTex Pro segmented reflective tape lines the wrist, forearm, stomach and waist area and is lightweight and flexible. The jacket is luminous yellow in order to ensure you are safe and seen at all times, no matter what you do or where you go. Is The S548 a Safety Jacket?The Portwest S548 is a European Regulation certified safety jacket licensed as a highly visible garment. That means that the S548 has passed a series of tests that decide whether a product is safely visible in dark and low-visibility settings. Due to the increase in surface area with a larger size, size M and above is rated as more visible than a size small. Please see below for more information: EN ISO 20471 Class 2 (Size S) EN ISO 20471 Class 3 (Size M+)What Fabric Is The Portwest S548 Jacket Made From? Shell Fabric: 100% 4 layer polyester with breathable breathable thermoplastic polyurethane waterproofing membrane Lining Fabric: 100% Polyester Tafetta Padding Fabric: 100% Polyester (260g) Contrast Fabric: 100% Polyester Pongee Ripstop with thermoplastic polyurethane bonded to 100% Polyester Tricot Knit (150g) Declaration of Conformity Declaration of Conformity Data Sheet Portwest S548 Hi-Vis Carbon Fibre Heated Tunnel Jacket