Ventilation - Aerodynamic design that's been designed in a wind tunnel. Adjustable - 3D tightening wheel. Lightweight - Enjoy the product's light weightOnly 248 g. HOW DO YOU CHOOSE YOUR MOUNTAIN BIKE HELMET SIZE?: To find out your helmet size, just measure your head size (from the forehead to the top of the neck). This mountain bike helmet is available in three sizes: .M: 55 - 57 cm.L: 57 - 59 cm.XL: 59 - 62 cm.WHEN SHOULD I REPLACE MY HELMET?: We recommend replacing your helmet in 2 cases: .1/ After a fall.In the event of a fall, the material of your helmet can deteriorate or even break. Sometimes, you won't even notice. That is why we recommend replacing it if you have the slightest doubt. .2/ After 5 years of use.The foam of your helmet degrades over time. It can deteriorate due to impact, where it is stored, the climate, and its use. We recommend replacing your helmet at least every 5 years.HOW DO YOU ADJUST THE HELMET?: Follow these 2 quick steps to adjust your helmet in 5 minutes: .1/ Clip the 2 straps with the buckle: check that you can still slide 2 fingers between the strap and your chin. .2/ Finally, adjust the tightness around your head. .The helmet should be in contact with your head, without tipping forward, backward, or sideways, even when you're moving. Weight: M: 248 g.COMBINING SPORT & SAFETY: The helmet can seem restrictive at first. The Rockrider team is unanimous: for mountain biking, helmets have an important role to play. Moreover, we all wear a helmet. For us, helmets are essential. Don't forget to wear one! ;).Returns conditions for personal protective equipment: Make sure that this product fits properly. .If you do need to return it, you will need to make sure it still has its instructions, labels and, where applicable, original packaging. so that it can be reconditioned. Let's take care of our planet, together. conditions: https://tinyurl.com/4jdc584f

Wipe clean only. Shell, 100% Polycarbonate, Buckles, 100% Polyoxymethylene, Foam, 100% Polyurethane, Webbing, 100% Polypropylene.

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Please note, we cannot offer refunds on fashion face masks, cosmetics, pierced jewellery, adult toys, and swimwear or lingerie if the hygiene seal is not in place or has been broken.

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