Metrocycle's best selling helmet! The most affordable MIPS helmet we offer. The Trella Helmet offers a comfortable fit with deep coverage and open ventilation in a design that is suitable for everything from swooping single track trails to the city streets. Women Universal size: 50 - 57cm What is mips? -- Multi-directional Impact Protection The MIPS system itself is a low friction layer that sits between the EPS foam and the helmet liner, and allows for a sliding motion of 10 to 15mm in all directions. This aims to reduce the transfer of rotational motion onto your brain. In short, MIPS works by using a moving layer to prevent rotational impacts from passing onto your brain. MIPS technology mimics your head’s own protective structure. Between your skull and your brain is a layer of cerebrospinal fluid, which allows your brain to slide inside your head, protecting it from rotational forces caused by oblique impacts.
