SILCA Introduces Seat Capsule Premio, a rigid seat pack offering that becomes the latest seat bag offering in the SILCA lineup to be secured to the saddle rails using the Boa Closure System. Since the launch of Seat Roll Premio, SILCA design an d Boa technology have proven to be an award-winning combination. This latest offering from SILCA, is designed for riders who prefer more a structured bag than what a seat roll has to offer.