Trousers with the company logo on make it easy for customers to identify which company your employees are from to avoid any confusion. They are useful for practical work and having something to change into if they need to go from office to warehouse floor. They are also good to have available for office staff to buy if they wish to show that they are committed to the company and by wearing their polo shirt out and about, this provides a method of advertising for your company. Or with information about an event on to endorse it.
With products from well known manufacturers you are guaranteed to be satisfied with whichever product you choose to purchase.