1、Large Capacity: Bike frame bag has enough inside room for long rides, holds a lot of stuff like wallet, phone, keys, small tire pump, glasses, water bottle, repair tool kits, energy gel, gloves and etc. 2、Durable And Water Resistant: The bike top tube bag is made of ultralight and stylish carbon fiber composite PU waterproof fabric with snap design, which ensures a secure fit, preventing it from falling off and allowing easy access. Great use for rainy or sunny day. 3、Sturdy Construction: Stiff bottle plate help the frame bag retain its shape, would be very steady. Don't worry about deformation and protect your items from squeezing. 4、Convenient: The bike triangle bag can be easily relocated according to cycling needs, can be attached to the frame, front fork, or used as a water bottle holder. 5、Easy to Install or Remove: Adjustable straps can be installed stably and safely, the universal angle is suitable for the tripod of most bicycles. The bicycle bag would not move around even if you ride on a bumpy or rocky road.