Elastic Buckle closure Removable and flexible chin cord, universal fit any kind of hat.A great and necessary accessories for your fishing hat, hunting hat, sun hat,and so on. No matter your hat has eyelet or not, this chin cord will works perfectly. A great removable strap to protect your hat from blowing away . Two metal buckle, tie the strap to your hat tightly. The spring loaded stop cord lock adjust the length of the strap. Very secure chin strap for sun hat in windy situation. With this little tool,enjoy yourself in many kind of outdoor sports, fishing, hiking, camping, travel