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 7 inches, iPhone XR XS MAX X 8 7 6s 6 plus 5s / Samsung Galaxy s8 s7 note 7, shake-proof bike front frame bagHIGH SENSITIVE TOUCH SCREEN: The bike phone bag has a high sensitive TPU film window which can helps you use cellphone easily while riding, great way to see your activity while using maps on a ride. (Note: Touch ID NOT worked through the screen cover)HUMANIZATION DESIGN: The bike phone mount bag has many humanization designs. A, The hidden chager hole allows you charge the phone when power is low. B, dual soft rubber zipper pulls make it convenient to open & closeDURABLE & WATER RESISTANT: The bike top tube bag is made of ultralight and stylish carbon fiber material with sealed double zippers closure, which ensures the water doesn't flow into the bag.EASY TO INSTALL & QUICK RELEASE: 3 straps are firm enough to hold up on the bike, 1 velcro commuter strap on the front + 1 longer commuter strap on the upper bottom( the long strap can fixed the bag on the head tube firmly) + 1 commuter strap on the lower bottom. The bicycle bag would not move around even if you ride on a bumpy or rocky road