Although I have not personally used this item as I have purchased this as a gift to ensure my guys dome piece was well protected for mountain biking, I do have feedback to share. With a 23.5 inch head circumference he fit perfectly in the size range for the Large on the sizing chart and when received, the Large fit him perfectly. The helmet is lightweight, easy to get on, allows plenty of ventilation, and perfect for his needs. He did have two features that he was not sold on at first, but has come to like them. The first was the padding felt a bit too plush to start in the jawline and lower cheek regions, but seems to have packed out a bit by forming to his face with use. The second is the closure system for the helmet strap was a bit of a pain at first, but with a few rides he has gotten the hang of it. Fingers crossed he doesn't go down hard enough to truly test its durability, but it seems to be a very well designed helmet.