Review on SHARKMOUTH Hiking Hydration Backpack Pack with 2.5L BPA Free Water Bladder - Spacious and Comfortable for Extended Hikes, Day Excursions, Daypack Travel, and Journeys by Brian Whitmore

USEFUL: I went to Zion National Park a few weeks ago and found that a 2.5 liter bladder held more than enough water to hold my 5 foot 9 inch and 135 pound physique over several 5 to 7 hour support hikes in sunny Utah weather. At the end of each day I had about 1 liter of water left and I was already well hydrated before hiking and using a backpack. Proper weight distribution has also really helped with my back issues and made hiking with water a lot more comfortable. I've walked with multiple water bottles or heavy flasks slung over my shoulder many times in the past and I won't be going back. DESIGN: I wouldn't go back I called this backpack small but very compact. In practice, I have found that the insulated and medium pockets have more than enough space to fit sandwiches and other snacks, my DSLR with lens attached, a tightly rolled windbreaker, baseball cap, hat, handbag and sunglasses. (everything above f is in addition to a fully filled water bladder). As a precaution I kept all my sharp tools in the front pocket to avoid piercing the water bladder, like a knife/utility tool, as well as the rest of the essentials, like a first aid kit, headlamp, compass, fire starter, etc. The front one Chest strap has an emergency whistle built into the buckle, which I didn't notice at first, and it's definitely loud enough to alert someone in an emergency. The shoulder straps are also reversible, allowing you to route the hydration tube through any strap, and the tube clamp can also be moved to either side. I have looked at others here. It has plenty of storage space with 3 zipped compartments and the side pockets are great for an extra water bottle or other items. And if that says anything at all, I think the "Shark Mouth" marking on the packaging and the bladder itself looks pretty good, despite being less well known.