【Design idea】</br>* Enthusiasm：the world is colorful,everybody has his own road,the only same is life need enthusiasm. * Youth：Own a youth positive attitude is helpful to everybody,it is the soruce power for life. </br></br>【Material matching】 *Colorful Cotton thread. </br></br>【Test Standard】</br> * Hand washing test: After washing 100 times with soap, no water was found to be stained, and the surface was faded and aged. </br>* Sweat test: The product was soaked in salt water for half an hour and no significant fading was observed. </br> * Material chemical environmental test: verified by third party agency, no harmful substances were found </br></br>【How To Use】 </br>Easy to put on and take off: </br> * Put on: Align the strap connector with the watch strap slot and move the strap to the appropriate position (usually a click sound is heard) </br>* Take off: Press the button on the back of the Watch to remove the strap that needs to be replaced. </br></br>【Maintenance】</br> * Should be cleaned regularly to prevent dirty. Do not wash by washing machine. hand washing force should be gently and evenly . </br> * After cleaning, put it in a cool and ventilated place to dry naturally. Do not put it in the place where it is exposed to the sun or in a high temperature to prevent accelerated aging. </br> * Avoid contact with sharp and sharp objects to prevent scratches and scratches. </br></br>【Customer Service】 * According to amazon’s customer service.