Consider the quality of the blades, whether they are interchangeable or self-sharpening, battery life (for cordless machines), and cleanability (washable or with a special brush). Also, check if it includes accessories such as trim or a waterproof design.

Rotary ones have rotating sections that follow the curves of the face and are usually better for thicker hair. Mesh shavers have blades that cut hair through a metal mesh and are usually best for sensitive skin and short shaves.