The Action Outdoor Red filter is designed for the GoPro Hero3+ Black, Silver, and White Edition camera housing. This red filter provides color correction when filming in blue and tropical waters. Why A Red Filter? The GoPro's automatic ISO is fooled when filming at depths due to the lack of red light. The cameras "brain" thinks that all of the colors of the light spectrum are in front of it even though the red wavelength is missing. This causes the GoPro Hero3 to record videos which are too blue or too green. The Action Outdoors Cube Red filter will filter out excess blue's and green's leaving behind vibrantly colored Videos. When To Use? You will want to use your Red filter when filming at depths of 7-25 meters. When filming at the surface, simply snap the filter off and shoot without a filter. As you descend simply snap the filter on and capture the vibrant tropical colors! Why a Snap on Filter? A snap on filter gives you the most versatility when filming with a GoPro. Film inserts easily blow away, difficult to install when outdoors, and get damaged easily. Our Snap On Filter is easy to clean, and installs/removes seamlessly in the field. Warranty: If you are not 100% satisfied with your purchase you may return it for a full refund in its original conditions.