USA-Made SLUG Core Training Buoy Bag - Oversized Weighted Bag -- D-Ball (BAG1231BK)

Available from 50 to 150 lbs.
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D-Ball SLUG Core Training Buoy Bag for Strength Training
D-Ball SLUG Core Training Buoy Bag for Strength Training
D-Ball SLUG Core Training Buoy Bag for Strength Training D-Ball SLUG Oversized Weighted Bag for Cross-Training D-Ball SLUG Buoy Bag for Functional Training Exercises D-Ball SLUG Core Training Buoy for Lifts and Carries

D-Ball Medicine Balls

D-Ball American-Made Core Training Buoy Bag - The D-Ball SLUG by Mondo is a buoy-like oversized weight that is perfect for carries, lifts, drags, and throws executed during core training, functional strength training, and balance training. Ranging in weight from 50-150 lbs but retaining a consistent size of 31 inches long and 11 inches in diameter, the D-Ball Slug works well for athletes of all abilities, strength levels, and skill levels. Its molded marine-grade vinyl polymer surface works well for indoor and outdoor exercises. The D-Ball SLUG does more than focus on a single muscle group, conditioning the entire kinetic chain to create balance and enhance performance. With the SLUG you can perform explosive throws, extensive core exercises, even "ground and pound" MMA-style training.

Are you training to become the next CrossFit regional, national, or world champion? Manufacturer D-Ball is the top supplier of weighted balls and oversized weights for CrossFit specific work and skill execution. The SLUG was developed specifically for the Sprint Carry competition at the 2014 CrossFit Games. CrossFit is well known for taking non-typical physical movements and turning them into exercises during training and competition. Athletes are expected to perform at peak levels through often times unexpected learning curves during competition. The oversized weighted buoy shape of the SLUG makes it the perfect "training tool for the unexpected" since athletes can perform bear hugs, dead man carries, standing lifts, crouching lunges, heaves and throws. With its unique design and surface, the SLUG will challenge you in ways you never imagined.

How is the SLUG manufactured? The current Core Training Buoy is fabricated quite literally from a repurposed marine buoy mold used for large fishing ships. D-Ball starts by using polyvinyl chloride (PVC) that goes through a unique rotational molding process perfected by parent company Mondo Polymers. Liquid PVC is poured like molasses into a mold, baked in an oven, and then cooled down to a flexible state. Each D-Ball buoy bag has a wall thickness of 3/8" no matter the overall weight. The roto molded final product has no stitching like leather, synthetic leather, or canvas covered bags, meaning it will not "split at the seams" from use over time.

D-Ball's philosophy is to make a fitness product that is useful always and everywhere. D-Ball uses a proprietary mixture of 6-7 fill materials inside each buoy, including but not exclusive to shredded foam, walnut shells, sand, and steel shot. Because of this, each buoy will have a consistent feel no matter the weight or exercise with no "slosh" effect or transference of materials from one end of the bag to the other. By merely changing the composition of the fill material, D-Ball can vary the weight dramatically from moderate to super heavy (using USA-manufactured steel shot as a heavy metal filler), all the while remaining consistent within a single length and diameter size. Some sand-filled weighted bags will clump, harden, and become permanently misshapen due to moisture exposure, also referred to as the "concrete" effect. D-Ball core training buoys experience no clumping, and no hardening due to the mix of fillers used. Moreover, a vent hole in the buoy plug allows each ball to adjust to atmospheric conditions such as heat, cold, air pressure, and altitude. No matter where the buoy bags are used, or whatever the temperature, the feeling and density will remain constant.

Purchase USA-Made D-Ball Core Training Buoy Bags on GSA contract - All D-Ball functional fitness tools can be purchased from IRON COMPANY® on GSA Contract GS-07F-0104M and CMAS Contract 4-12-78-0066A.

Who uses the D-Ball SLUG Core Training Buoy?

  • Cross Fit Gyms and Competition Teams
  • Wrestling Teams
  • Strength Coaches
  • Fire Departments
  • Military and Law Enforcement
  • Search and Rescue Teams
  • High School and Collegiate Sports Teams

Available Single Sizes - Includes (1) SLUG Core Training Buoy Bag:

  • BAG1231BK50 - 50 pounds
  • BAG1231BK60 - 60 pounds
  • BAG1231BK70 - 70 pounds
  • BAG1231BK80 - 80 pounds
  • BAG1231BK90 - 90 pounds
  • BAG1231BK100 - 100 pounds
  • BAG1231BK125 - 125 pounds
  • BAG1231BK150 - 150 pounds


  • Proudly MADE IN THE USA
  • Color: Black
  • 31" Long x 11" Diameter (all weights)
  • 3/8" PVC wall thickness
  • Soft, non-tacky feel on exterior
  • Medium to high density interior for a firm hold
  • Smooth surface (no texture or ribbing)
  • Weight designation painted on each end
  • Intended functional movements:
    • Carries
    • Lifts
    • Drags
    • Throws
  • Designed for indoor and outdoor use
  • Shipping dimensions (boxed): 33" x 12" x 12" (box adds 5 lbs. to unit weight)
  • Warranty: 1 Year for institutional use / 2 Years for individual use

The SLUG buoy bag can stand upright on end (vertically) during workout. When not in use, it is recommended to store buoy bag HORIZONTALLY to best distribute resting weight (especially on super heavy bags) to retain proper shape over time. Multiple buoy bags can be efficiently stored in pyramid fashion.

NOTE: Buoy Bags are NOT intended for slams and overhead throws to the ground. ONLY perform outdoor drags over natural or synthetic grass, outdoor carpeting, and similar softer surfaces. Not intended for drags over concrete, asphalt, gravel, sand, or dirt. Burst damage to bags as caused by slams and damage to exterior shell caused by drags over rough surfaces are NOT covered by manufacturer warranty.

Looking to make a bulk purchase of core training bags for your crossfit box or group fitness boot camp? Contact an IRON COMPANY® cross-training gear specialist today at 1-888-758-7527 or email

Shipping Included
Shipping cost included within the lower 48 states only

Ships via UPS (50 lbs to 125 lbs) OR ships via one of our various freight carriers on a wooden pallet (150 lbs only). This delivery is considered a curbside delivery only and will be delivered to a location at your address that is acceptable for a tractor trailer at the drivers discretion. Customers are required to be home at the time of delivery to sign the delivery receipt. On most deliveries, customers will receive a 24-hour notification call and lift gate service.

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