Bulk the right way with Select Smart Mass, the clean weight gainer. With no added fat, 60g slow digesting carbs and 40g protein from whey and casein for fast + slow digestion, we've formulated Smart Mass to be geared for lean mass gains, rather than dirty weight gain from simple sugars and fats. Smart Mass delivers our typical amazing taste and texture that you won't find in any other weight gainer. Maltodextrin free.