NAF Off Extra Effect is a concentrated liquid solution that deters flies, midges, and other pests from your horse, allowing them to relax. It offers naturally effective fly protection with an improved formula that provides a stronger fly repellent action and a pleasant new smell. This product creates an impressive barrier to repel horse flies and other insects, making them think twice about landing on your horse. It is water-based, ready to use, and suitable for everyday riding, hacking, and turnout during summer months. The key active ingredient is p-Menthane-3,8-diol 1% w/w. To use, apply the spray evenly across the coat. Store in a cool, dry place. Available in a 750ml spray and a 2.5 litre refill.