Sandbag Filler Bags

$12.5 ~~$24.99~~ In stock

These Sandbag Filler Bags from REP Fitness are designed to hold filler material inside your sandbag, allowing you to adjust weight for your training needs.

Available in Medium and Large sizes to fit different sandbag capacities.
Essential accessory for use with REP Fitness sandbags.
Helps keep filler material contained and reduces wear on the main sandbag.
Simple design for easy filling and swapping of weight loads.

Customer Reviews (4.4 / 5 · 5 reviews)

Samuel R. ★★★★★ Aug 23, 2026

The large size gives me plenty of room to double-bag filler and dial in the exact weight without any spillage. They hold up well to being yanked around during carries, and the material feels sturdy enough for repeated use.

John R. ★★★★★ Aug 22, 2026

The medium size fits my 50lb bag perfectly, and the double-layer fabric keeps the filler from poking through even after a few hard slams on the ground. Loading them up with pea gravel took less than a minute each, and the weight distribution feels much more balanced than loose fill.

Ava X. ★★★★★ Aug 21, 2026

Honestly didn't expect these to hold up so well since they're just liners, but the Large size still left plenty of room to stuff extra filler for heavier days. The double stitching along the seams feels solid even when I'm dumping them around mid-workout.