The sis sky 3 hour endurance pack is the perfect training energy bundle for any cyclist this ready prepared sis endurance pack is ideal if you are attending a training ride or event and need to ensure you have optimum energy before during and after to recover if you want a hassle free preparation of your energy food and drink reassurance you will be fuelled throughout your cycling day then the sis sky 3 hour endurance pack is just what you need sis sky 3 hour endurance pack features