Travel brush has a compact head with soft .007 channel trimmed bristles. Channel trimming allows for superior end rounding and polishing of each bristle for a better cleaning that is not harmful to tooth structure or gingiva (compared to a 'v trim' that allows for sliced and frayed bristles). Brush cover converts to handle. Vented cover to allow brush to dry. Great for increasing compliance by orthodontic patients on the go. This toothbrush is 6.5" long fully extended, and 4.25" long in travel mode.