... ; TODDLE 15-20KG chest 42-50cm Buoyancy 30N; CHILD 20-30KG chest 50-66cm Buoyancy 40N; YOUTH 30 ... waist belt ,back support,back adjusting belt, head band,neck support,shoulder support,wrist band ,finger support,elbow support ,thigh support,calf support,knee support ,knee pad ... 3.medical nursing care goods : high flexible waist support ,splint waist belt ,cervical collar,neck supports ,adjustable knee ...