The 1.5 SLE Vented model has been designed for high wind conditions (12-25 mph). The double vertical vents on each wing section allow air to pass through the sail. This in turn reduces the pull and allows the flier more control with less stress. The vented 1.5 SLE, weighing in at only 10.4 ounces, will add excitement and enjoyment to high wind conditions by increasing your comfort while flying with total control. This means the ability to accomplish precision moves and stop at will.