The Sidi Atojo SRS is the new kid on the block and sets the new absolute benchmark for off road motorcycle boots. Positioned even above the legendary Crossfire 3 SRS, the Atojo is a prime example of refinement and perfection for serious off road riding. The Atojo SRS is constructed from very durable and tough Technomicro® microfiber material. The inside is lined with air Teflon mesh and Cambrelle to keep your feet comfortable and yet keep the inside breathable. Just like the Crossfire 3 SRS, the Atojo SRS use the SRS Dovetail soles: replacing the soles of your boots is just a matter of minutes.The Sidi Atojo SRS feature a large protective PU shin plate. The heel and toe areas are wrapped in protective plastic/PU as well to protect you from impacts. Contrary to the Crossfire series, the Atojo SRS uses only 3 buckles (which are entirely replaceable of course) instead of four, together with an easy to adjust velcro closure at the top for a wider adjustment. What we love most about these boots though is the double Flex system: the Atojo SRS features one joint under the ankle, to reduce the width of the boot and make it more comfortable on the inside. The support brace placed inside has a lmiited excursion to prevent hypertension of the ankle, instep and back tendon. The second joint sits just about the ankle and works in sync with the lower joint to improve the flexibility of the boot without compromising rigidity and protection. The result is a boot very easy to move back and forth in, but it will still protect your feet and ankles from injuries caused by unwanted rotations.On the calf section of these boots you will find a large suede cover enriched with embossed rubber inserts which, in addition to providing good grip in contact withthe bike, have the function of protecting the leg from heat. The rubber inserts are also placed on the inside of the ankle.