Protect your head without weighing it down. The Petzl Sirocco climbing helmet is so comfortable and so lightweight, you'll probably forget that you're even wearing it!

• Monobloc shell made from expanded polypropylene minimizes weight without compromising impact resistance
• Excellent ventilation distributed around the shell helps keep you cool, dry, and comfortable
• Removable quilted foam liner adds extra comfort
• Fully adjustable to fit a range of head shapes
• Magnetic buckle makes it easy to manipulate with one hand
• Two hooks and rear elastic allow for headlamp attachment
• Size 1 fits 48-56 cm head circumference; Size 2 fits 53-61 cm head circumference
• Size 1 weighs only 145 g (531 oz.); Size 2 weighs only 165 g (5.8 oz.)