Abstract: An ergonomic band for attaching to a rear surface of a portable electronic device, or a case configured for attachment with such a device. The ergonomic band may include one or more slits for receiving at least one finger of a user such that the device becomes ergonomically attached to the hand or wrist of a user. Two ergonomic bands may be provided. Each ergonomic band enables relaxation of anatomical features during prolonged use of portable electronic devices. The ergonomic band, or bands, can be attached to a device or device case using an adhesive or mechanical fit, or alternatively the band may conform through a slot pair. In certain embodiments, the ergonomic band can be detached and re-engaged as desired by a user.