Which type of product is typically used in pet collars to provide protection from insects?

Impregnated products are specifically designed to be integrated with materials such as fabric or plastic, allowing them to release active ingredients over an extended period. In the context of pet collars, these products are treated with insecticides or insect repellents that provide sustained protection against pests such as fleas and ticks. The slow-release mechanism ensures that the active ingredients remain effective over time, making impregnated collars a popular choice among pet owners for convenient and long-lasting insect protection.

Granular pesticides, aerosol insect repellents, and liquid concentrates are commonly used in other pest control scenarios but are not typically suitable for use in pet collars. Granular pesticides are often used for outdoor applications, while aerosol insect repellents are more effective for direct application on surfaces or for immediate use. Liquid concentrates also require dilution and are generally applied in places rather than being integrated into wearable products like collars. Thus, impregnated products are the most appropriate choice for providing ongoing insect protection specifically designed for pets.