Abstract: An environmental shield secureable to a helmet, protecting a wearer. The helmet includes a rigid outer shell and a perforate liner positioned within the outer shell, leaving a space between a portion of the outer shell and the liner. The environmental shield can include a flexible sheet like main portion that shields the wearer when worn secured to the helmet. This shield includes an attaching portion of the main portion that is configured to secure the shield to the liner of the helmet in such a way that preserves the space between the liner and helmet so that air can flow into the helmet. Alternatively, the environmental shield can include a quadrilaterally shaped flexible sheet like main portion. This shield has two elongated flaps along one side of the main portion. Receded regions extend along adjacent sides from the flaps, and sloped so that the width of the shield increases. Shoulders protrude from the receded regions increasing the shield's width.