It has hooks on the outside making it easy to attach the ratchet straps to tie down whatever I haul on top. So far, they are comfortable and seem to be the best fitting product for my size ears. What is UK 6 is US 7 and so on. It?s a sturdy system and very easy to set up. 25. Other than that, everything is exactly as advertised and works amazing. Waa laa fixed that, come Spring Ill paint it to match the walls. Regardless, I will be buying another of the exact same headphone. Easy to install, fit perfectly with the screw hole on the bike. A suggested solution I found was to replace the battery (even if the "battery low" indicator was not flashing).