 However, they may not be sufficient to handle extremely severe icing, where ice can accumulate faster than the boots can shed it, or it accumulates on non-booted surfaces to the point where there is a dangerous loss of lift or control, or increase in weight.Deicing boots are most commonly seen on medium-sized airliners and utility aircraft.Larger airliners and military jets tend to use heating systems within the wing, keeping it constantly warm and preventing ice from forming.