As the cuff flexes backward in response to pressure from your calf as you push the brake foot forward, it forces the brake downward until it begins to drag on the pavement. Because you can lower the brake pad as it wears down, or raise it as your braking skills improve, it's also appreciated by more experienced skaters. Look for vents in the boot and liners in both plastic and soft boot skates. Breathability slows down the buildup of perspiration as your feet heat up. Being lightweight makes any skate more maneuverable and less tiring over long periods.
Vents improve airflow and help reduce the weight, too.
Many soft boot models are outfitted with a plastic hinged cuff for added support. In-line skates are manufactured with every possible combination of buckles and laces. A top buckle delivers solid ankle support. All-buckle models are easier to get on and off your feet. Men's, women's, and junior models are usually available in a good manufacturer's skate line.