LARGE SPACE: Bike bag has enough inside room for long rides, holds a lot of stuff like iphone X, battery, energy gel, small tire pump, repair kits, keys, wallet etc. Perfect compatible with cellphones below 6.5 inches, iPhone XR XS MAX X 8 7 6s 6 plus 5s / Samsung Galaxy s8 s7 note 7, shake-proof bike front frame bag

DURABLE & WATER RESISTANT: The bike top tube bag is made of ultralight and stylish TPU material with sealed double zippers closure, which ensures the water doesn't flow into the bag.The sun visor and flashing board is great use for rainy or sunny day

EASY TO INSTALL & QUICK RELEASE: 3 velcro straps are firm enough to hold up on the bike, 1 velcro commuter strap on the front + 1 longer velcro commuter strap on the upper bottom( the long velcro strap can fixed the bag on the head tube firmly) + 1 vercro commuter strap on the lower bottom. The bicycle bag would not move around even if you ride on a bumpy or rocky road

HUMANIZATION DESIGN: The bike phone mount bag has many humanization designs. A, The hidden earphone hole allows you answer the phone or enjoy music freely while cycling. B, reflective tapes on both sides of bike bags to keep your night ride safety. C, dual soft rubber zipper pulls make it convenient to open & close