Attribute:The Joy bicycle seat is ergonomically designed for your child's comfort and is compatible with the use of a helmet. Its openings in the backrest contribute to better ventilation and reduce air friction, ideal when used without the child. It also has integrated foot protection, adjustable footrests, increased side protection area and a rear reflective sticker., 3 point safety harness Adapts to round and oval tubes between 28 to 40 mm Adjustable footrest Compliant with TÜV GS - EN 14344 E-bike compatible For bicycles with 26'' to 28'' wheels Helmet compatible Maximum child weight - 9 -22 kg Optional positioning Safety reflective stickers Space needed for assembly - 105 mm Tool included