A seatbelt or harness is a standard feature in all stairlifts as it helps to stop users from slipping out of the seat. This form of lap belt is specifically important for standing or perch stairlift models where the users are unable to bend their knees or hips and a seatbelt keeps the user safe as the lift moves up or down the stairs. Call us today at (888) 542-3834 If you are looking for a good stairlift stores Mountain West.