A heavy-duty microfiber PU (polyurethane) grappling dummy with legs is a training tool used in martial arts and combat sports to simulate a live training partner for grappling and ground-based techniques. Here are some features and considerations for such a grappling dummy:

1. Material:
   • Microfiber PU: Microfiber PU is a synthetic material that is durable, resistant to wear and tear, and provides a realistic feel for training.
2. Construction:
   • Heavy-Duty: Look for a grappling dummy with a heavy-duty construction that can withstand intense training sessions and repeated use.
3. Design:
   • Legs: The inclusion of legs allows for a more realistic simulation of a training partner, especially when practicing techniques involving leg control and submissions.
4. Weight Distribution:
   • A good grappling dummy should have a weight distribution that mimics the feel of a real opponent. This helps in developing the strength and techniques required in live sparring.
5. Size and Weight:
   • Choose a grappling dummy with the appropriate size and weight for your training needs. Dummies come in various sizes and weights to accommodate different skill levels and training scenarios.
6. Flexibility:
   • Look for a dummy with flexibility in the joints, allowing you to practice a variety of techniques, including joint locks and submissions.
7. Filling Material:
   • The filling material inside the dummy contributes to its weight and feel. Common filling materials include shredded fabric, foam, or a combination of materials.
8. Reinforced Seams:
   • Reinforced seams enhance the durability of the grappling dummy, preventing tearing or damage during use.
9. Versatility:
   • Some grappling dummies are designed to be versatile, allowing for training in various positions, including mount, guard, side control, and back control.
10. Adjustability:
    • Consider whether the dummy has adjustable limbs or weight to customize your training experience based on your specific needs.