Petzl Vertex Vent 2 Helmet<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>Shock absorption achieved through deformation of the outer shell</li><li>Strong chinstrap (more than 50 daN) limits the risk of losing the helmet during a fall</li><li>Six-point textile suspension conforms perfectly to the shape of the head</li><li>CenterFit adjustment system adjusts the headband and keeps the helmet centered on the head</li><li>Vent holes with sliding shutters allow the ventilation to be adjusted as needed， while wearing the helmet</li></ul></div><img src="http://ecx.images-amazon.com/images/I/51mfi0iRvpL.jpg" noproxy>