Full Adjustability: 2 hook and eye closures with 3 positions at the back, and adjustable racerback strapsPadded Straps: For long mileage, all day comfortChestband Comfort: Plush ribbed elastic and a short line chestband for a forget-you're-wearing-it feelHeat Release: Sewn in molded cups have perforation for breathability and mesh panels are placed for maximum airflowWhen to Wear: Long mileage days when comfort is a priority