<b>Because of immaturity digestive development, especially the lack of the fat layer surround abdominal wall and intestinal .when baby sleep naked and exposed their abdomen,they will be vulnerable to the stimulation of cold air and increase the number of cacation, decrease moisture absorption and catch a cold, so it is very important to protect baby's belly button well.</b><br> <br> <b>About Natural colored cotton</b><br> <br> Natural colored cotton is a new kind of cotton ,seed of modern high-tech cultivated, it accompanys with a natural color when it boll opening in the Field .<br> <br> Cotton have only three colors, white, brown, green . just like different hair color, all is inborn .<br> <br> Super soft combed colored cotton,anti-pilling ，lint free .<br> <br> Colour and lustre is primitive simplicity and elegant, natural inborn.<br> <br> Breeding process without chemical bleaching, no pollution to the environment.<br> <br> Recognized as a natural zero pollution, green ecological products, enjoy reputation of the second skin of human, plant cashmere and so on.<br> <br> Natural combing colored cotton, additive free,ANTI-PILLING ，lint free, suit for baby and child .<br> <b>About Skyflying</b><br> Skyflying is the newborn creative company founded in 2014 ,we are trying our best to provide a new world for all people who want a better,convenient and fast life .<br> We provide  creative ,durable and high-quality products ,all we want is you  recieved products gain satisfaction and happiness .<br>