mprove your posture and activate your core while sitting! This ergonomic balance seat cushion is great for office chairs or home desks — designed to strengthen your back and core muscles while encouraging proper posture. Features: ✅ Improves sitting posture ✅ Strengthens core & back muscles ✅ Instantly improves balance — no more slouching ✅ Perfect for office chairs, home workstations, or gaming setups Condition: Brand new, unused, in original box (see photos) Color: Black
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