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<p>Climbers, come out of your shells. By borrowing the plastic used to reinforce car bumpers, Petzl ditched the usual outer layer to bring you a UIAA-certified helmet for about half the weight of your average lid. Unlike the crunchy foam inside most hard shells, the Sirocco’s expanded polypropylene is durable and flexible, maintaining good impact absorption through repeated impacts.</p>
<ul>
<li>Made of expanded polypropylene, which has a high rate of energy absorption, and does not support microbial growth (to reduce odours)</li>
<li>Shell has excellent ventilation and is adjustable</li>
<li>Comfort foam is quilted, lined with absorbent fabric, and removable for washing</li>
<li>Lightweight polyester adjustment system further reduces weight</li>
<li>Minimalist buckle saves weight and holds it securely</li>
<li>Open profile front lip improves visibility</li>
<li>2 front clips and rear elastic keep your headlamp secure</li>
</ul>

Petzl Sirocco Helmet - Unisex

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Microshell helmets are made of a thin polymer sheet over a foam liner; Hardshell helmets have a hard polymer outer shell and a foam liner; when the liner is being bonded to the outer shell during the manufacturing process, it is Molded in the shell.

Most helmets are tested and certified for a specific sport. Some helmets are approved for multi-sports, but only after passing the safety tests for both sports (i.e., snowsports and cycling).

Cetification is established by a variety of governing bodies who set impact standards. Most helmets are certified or approved for a specific sport, except in the case of multi-sport helmets (i.e., a snowsports helmet might also be approved for cycling if it meets the cycling safety standards).

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Petzl Sirocco Helmet - Unisex

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