Material seems tough, but pliable. But for the price, this bag does what i expected it to do.

L is huge lol. Would have been 5 but did not come with small bag in picture. It is exactly as pictured with a bonus -- a 2l bag as well! Comes with a smaller bag that can be clipped onto the front and is also waterproof.

I like the zippered pocket and combined with a ziplok bag allowed me to keep the phone safe but easily accessable. It is water resistant rather than water proof because of the zipper.

The backpack straps fit very comfortably on me. The straps seem very sturdy. The two adjustable straps make all the difference for him!

This bag is so awesome! Love the backpack. Great price. Super happy with purchase. Would definitely purchase again.

The entire bag bulges out and against your back. This pack has a major weakness the bottom portion of the pack is not reinforced. It needs an additional layer of a durable, vinyl/rubber to withstand abrasions and maintain its waterproof integrity.