The Men's Adrenaline Bike Jacket is fully waterproof with taped seams, the fabric is Isodry which is waterproof and breathable making it ideal for ativities such as cycling and running. The men's bike jacket is highly breathable and is mesh lined to further improve the breathability. The active outdoor jacket has a reflective back print and piping for increased visibility while pit zips provide extra ventilation as well as an adjustable hem and collar provide additional comfort and enhanced fit. The Adrenaline Hi-Viz jacket has an extra long scooped back as well as a micro fleece collar lining for improved comfort and warmth. The jacket also has a chest security pocket and zipped back security pocket..Waterproof Isodry fabric The Men's Bike jacket is made form the highest specification fabric used by Mountain Warehouse, Isodry. Waterproof Isodry fabric is a waterproof and breathable membrane constructed of one way valves trapped between two to three layers of fabric, this allows water to pass through one side but not the other for example: perspiration will be drawn out, but rain will not seep in. Mesh liningThe jacket has been lined with mesh to improve the overall breathability.Breathability is achieved by the ability of the fabric to draw moisture away from the skin to keep you feeling cool and dry. ReflectiveThe Men's jacket includes a reflective back print and reflective piping for increased visibility when running in the dark.The piping and print at the back of the jacket are designed to pick up and reflect light so you can be seen in the dark.Extra VentilationPit zips allow increased ventilation while exercising, when you start to get hot simply open the zip for added airflow.