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Optimum Nutrition | Serious Mass Gainer 12Ib
Optimum Nutrition | Serious Mass Gainer 12Ib
Optimum Nutrition | Serious Mass Gainer 12Ib
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Optimum Nutrition | Serious Mass Gainer 12Ib

Marsoni M251S
Sale price$169.95
Pay 4 payments of $42.49 a month.Shop Pay
Get it in 3 business days with 1 day shipping. Friday, May 29
Optimum Nutrition | Serious Mass Gainer 12IbSerious Mass is the ultimate in weight gain formulas providing you with the tools you need to pack on the pounds and develop the physique you've always wanted. Each serving of Serious Mass contains 1250 calories derived primarily from protein sparing complex carbohydrates and a high quality protein blend consisting of Whey Protein Concentrate, Calcium Caseinate, and Egg albumen. Creatine Monohydrate, Glutamine, Choline, and Inositol have been added to
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Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
4.8 ★★★★★
Based on 1744 reviews
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Product Reviews
M
Verified Purchase
Melissa P
Dallas, US
★★★★★ 3
Not as tall as anticipated
Color: Black, Size: Wheel-6 Panel
Definitely not 6 feet tall, more like 5 1/2. Very sturdy and the fabric is thick. Works well for what we're using it for.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on November 30, 2025
V
Verified Purchase
Vickie Dovel
Carnegie, US
★★★★★ 5
Easy to put together
Color: Grey, Size: Wheel-6 Panel
Love them
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on December 17, 2025
N
Verified Purchase
Nicole
Chelsea, US
★★★★★ 5
Perfect Divider!
Size: 102''Wide-3 Panel, Color: Beige
This is perfect! Exactly what I was looking for, for my office. Set up was easy and very sturdy. Looks nice
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 27, 2026
A
Verified Purchase
angela
Lowell, US
★★★★★ 5
Does what expected
Size: 132‘’Wide-6 Panel, Color: Black
Did exactly what we needed. Not terribly sturdy so don’t expect a lot
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 27, 2026
G
Verified Purchase
Gabby
New York, US
★★★★★ 5
Very pleased with this purchase
Size: 88‘’Wide-4 Panel, Color: Grey
This is very easy to assemble, light weight, and does exactly what it is supposed to. I thought it would be a little bit taller, but it gets the job done.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 18, 2026

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