Optimum Nutrition Serious Mass Flavour:CHOCOLATE More freedom of movement thanks

More freedom of movement thanks to extra large comfort zone

Seat automatically adjusts with the back pad for ease of use

Gain access to huge bodyweight exercises like chin-ups

Dimensions: (L) 46cm x (Diameter) 13

Start sipping before

Optimum Nutrition Serious Mass Flavour:CHOCOLATE More freedom of movement thanksOptimum Nutrition Serious Mass the ultimate in weight gain formulas. Ectomorph's rejoice! If you are training hard, doing the work everyday, squatting hard but not putting on the size you want then you should try Optimum Nutrition's Serious Mass. Benefits: Not just a weight gainer but a great all round supplement with added Creatine and Glutamine Very high in carbohydrates and calories that can be used to increase your daily protein and calorie intake