Based on this product's specifications, here are some alternatives and similar models
Workout bag HMS WBF20 — HMS 20 kg capacity training sandbag
Summary description:
HMS WBF20 workout bag is a durable training sandbag designed for functional fitness, strength and conditioning exercises. With a 20 kg capacity, it accommodates sand or weighted filler for squats, lunges, throws, carries and core work. Constructed for gym and home use, the bag supports varied grip positions and dynamic movement patterns during resistance and conditioning sessions.