... of contamination 3. in accordance with CE, ISO14001 and ISO19001 Waist & Back Massager 1. Material: plastic wood and A3-typed carbon ... , one-time powder coating4.Functions: to exercise the muscle of waist & back and then strengthen their flexibility. 5. The method of ... before your training. This can prevent from hurting your neck, waist and nurse.Third, do some coolingdown exercise after your training ...