I purchased this item to hold my cycling head lamp battery on night rides. I haven't hit the trails under the stars just yet, but I have used this item while running on the treadmill to hold my cell phone so I could used standard (wired) earbuds while I ran. I was impressed with how well this product kept the phone in place. I never once thought about the phone in the back-center pocket at all during my 5 mile treadmill ripper. I was so happy with this product that I just ordered another one this morning, literally, no bull. I am excited to hit some singletrack under the cloak of darkness with this base layer soon.
Very comfortable as a base layer for Autumn riding. I imagine it will be perfect for balmy hot summer riding here in the Northeast.
It is perfect to wear under a looser jersey or shirt to carry the basic stuff...phone and tools. It is pretty snug...I liked it, but if you are in between sizes or like base layers a little looser I jump a size up..Godspeed and Happy trails!
Love the rear pockets to store phone, etc while wearing loose shirt over it!