Waterproof: The bike top tube bags are made of 90D film/210D Polyester Oxford cloth, more durable and stronger. Comes with waterproof zipper, perfect for different riding situation and very easy to clean. (Please note that do not soak the bike frame bag in water or rain for a long time. )Lightweight and Humanized Design: This bike frame bag only weights 6.35oz/180g each. The width is only 6cm/2.36''. The narrow design will let you do not hinder the movement of the legs during riding.Easy installation and Adjustable: This front frame bag come with three upgraded velcro straps which have been reinforced to simplified installation process. Tool free. The bag strap position can be adjusted according to the bike frame space ratio.Multi-Purpose Handphone Hold Design: The special headphone hold design allows you to enjoy music while riding. Can add more fun to riding.Widely Use: This frame bag is compatible with almost mountain/ road bikes. Big enough to hold all of your tools and necessary items. Such as phone, wallet, keys, cards, bike repair tools, earbuds and more.