A water-resistant trimmer is a device whose design is adapted for safe contact with water. In practice, this means it can be rinsed under running water without concern, which significantly facilitates its cleaning and maintenance. Removing trimmed beard or body hair from the head is thus quick and hygienic. Some fully waterproof models also allow for use directly in the shower, which saves time and simplifies tidying up. The option of so-called 'wet trimming,' meaning use on wet skin, often with shaving foam or gel, can contribute to greater comfort and less skin irritation. The degree of water protection is sometimes specified by the so-called IP rating (Ingress Protection).