Review on Optimized Insulated Hydration Backpack | Lightweight Day Pack for Hiking, Running, Cycling | Includes 3L BPA-Free Water Bladder by Demetrius Holt

Excellent lightweight backpack. I love the waist strap and chest strap. There was only one problem with the delivery. The backpack has two straps to hold the hydration bladder, but there is only one hole in the hydration bladder for the strap. Looks like a factory assembly problem. I hope that future batches will be corrected. I had to buy a separate cylinder as I didn't have time to wait for the manufacturer to send me a replacement. I'm not even sure if I can get an answer from the manufacturer.