The Bontrager Rally MIPS Mountain Biking Helmet is a versatile trail riding helmet with the added protection of MIPS. MIPS (Multi-directional Impact Protection System) was developed by brain surgeons & scientists to allow a small amount of movement in the helmet on impact, helping to reduce rotational forces on the brain caused by angled impacts to the head. As well as the extra protection added by MIPS the Bontrager Rally has extended rear & side coverage to boost your confidence on tricky technical sections & ample vents to keep you cool on long climbs. The Rally also comes with a BOA adjustment system so you tweak the adjustment of the helmet with one h&. One of the unique features of the Rally MIPS helmet is magnetic Blendr mount system so you can easily, & safely, mount lights & cameras on the helmet without the need for third party brackets. If you don’t need the Blendr mount it is easily removable. Features MIPS Brain Protection System The Boa® System lets riders easily secure & adjust helmet fit with one hand Blendr mount system easily integrates Go Pro camera & Bontrager lights accessories Drop-in coverage on back of helmet offers extended protection In-mold composite skeleton increases helmet integrity for larger vent variations Flat Lock dividers make helmet strap management simple through fixed position fit Internal, recessed channels move airflow over your head to stay cool & dry Crash Replacement guarantee provides a free helmet replacement if involved in a crash within the first year of ownership