The Oakley DRT5 Trial/Enduro Mnt. Bike Helmet - Inside View - It shows the MIPS liner, which various reviews said that it moves/rotates more than the MIPS on many other helmets. MIPS stands for Multi-directional Impact Protection and is an ‘ingredient’ safety technology that over 120 brands incorporate into their helmets. FUN FACT: In 2020, there were around 729 helmets on the market with MIPS. MIPS is used in many cycling helmets, but it is also used in equestrian helmets, construction helmets and motorbike helmets. 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. While linear, or straight-on, impacts can lead to skull fractures and bleeding, MIPS says studies show rotational impacts can lead to concussion and serious traumatic brain injuries. In short, MIPS works by using a moving layer to prevent rotation, plus side and/or 3/4 view impact l impacts from passing onto your brain. This helmet is very comfortable, even though it only has one pad. Stock the black rectangular pad was where the single blue pad is now. I move the black pad up to the plastic BOA system, where it touches the base of my head/neck. I added the two other pads as well. • Also pictured is the unique silicon rubber sweatband, which actually works better than just an absorbant foam pad.