Model selection The choice must be made taking into consideration the following parameters: 1. Weight/Size For the large/heavy athlete, the Booster Medium or the World Cup is more suitable, for the the Booster Soft for light/small athletes. 2. Aggressiveness For the aggressive skier, the Medium and World Cup models are the most suitable, for the skiers, the Booster Soft 3. Discipline For technical disciplines, Medium or World Cup are preferable, for fast skiers the Soft 4. Ski boot plastic hardness Hard boot ® Booster Medium or World Cup, soft boot ® Booster Soft 5. Ski stiffness Hard ski ® Booster Medium or World Cup, soft ski ® Booster Soft We recommend starting with a softer model rather than a harder one. A softer model will have a lower elastic response, but will make it easier to feel the Booster's characteristic benefits. If the skier starts with a model that is too the benefits of the velcro strap.
