The TSG "Meta Solid Colors" BMX Helmet - Satin Acid Yellow is a solid In Mold construction (EPS foam bonded directly to the polycarbonate shell) which makes the helmet very sturdy and super lightweight. The TSG "Meta Solid Colors" BMX Helmet - Satin Acid Yellow is equipped with a dial at the base of the helmet for optimal and individual size adjustment. As well u can take off the padding of the TSG "Meta Solid Colors" BMX Helmet - Satin Acid Yellow for washing which is a big advantage.