AKOAK Set of 5 Hat Flexible Removable Chin Cord Windproof Strap Clip Adjustable Cord Fastener for Golfing, Fishing, Boating, Sailing, and Other SportsBlack Meterial:Elastic;Color:Black. Measure:Folded in half length about 34cm;Quantity:5pc. A great removable strap to protect your hat from blowing away. Removable and flexiblechin cord, universal fit any kind of hat. With this little tool,enjoy yourself in many kind of outdoor sports, fishing, hiking, camping, travel.