1. Eyourlife Military Tactical Backpack Small Rucksacks Hiking Bag Outdoor Trekking Camping Tactical Molle Pack Men Tactical Combat Travel Bag 20L Camouflage (Click Link to Check Price on Amazon)
Editor's Rating : 9.3 out of 10
JUST THE RIGHT SIZE: Main Compartment:17.7"x9.4"x4.7", Secondary Compartment: 15.7"x7.8"x2.75", Upper Front Pocket: 4"x7"x2.3", Lower Front Pocket: 9.8"x7"x2.3". Small but sufficient enough tactical hiking bag, Capacity: 20 L. If you need larger one, have a look at this B01AUFK3EM.PROFESSIONAL DESIGN: It has a roomy main storage area, dual FRONT POCKETS. MOLLE style ACCESSORY LOOPS on front. Padded and breathable mesh back panel and shoulder straps offer cushioning comfort, while also promoting air circulation along your back and shoulders, Almost the best simple & useful tactical backpack at this price.

2. Hydration Backpack with 2 Liter Water Bladder Fits Men & Women & Children for Running Marathon Racing Hiking Backpacking Hunting Camping Cycling Walking Climbing Kayaking Outdoor Survival (Click Link to Check Price on Amazon)
Editor's Rating : 9.6 out of 10
LIGHTWEIGHT AND BPA FREE - This hydration backpack has comfortable padding in the back. It is outfitted with a channel airflow system for comfortable extended wear, keeping your body cool, dry, and ventilated when cycling, hiking, biking, etc.WATER RESISTANT AND DURABLE DAYPACK - The main compartment is crafted with a high-quality rip-stop nylon - which is water resistant - so your belongings stay dry in light/medium rain. The bladder straw and hose are both removable for easy cleaning. The bladder opening is also large for easy cleaning and filling with liquids or ice. The zipper pulls and hanging strap are reinforced for durability.

3. Reinforced Design Water Resistant Backpack (Woodland Camo) (Click Link to Check Price on Amazon)
Editor's Rating : 9.5 out of 10
Adjustable Padded Shoulder Straps3 Large Compartments with Multiple Pockets and Storage

4. Military Rucksack Tactical Small Assault Backpack 30L Outdoor Hunting & Fishing Personal Defense - MULTICAM (Click Link to Check Price on Amazon)
Editor's Rating : 9.6 out of 10
COMPARTMENTS Multiple Main Compartments. Clam shell style opening master compartment with mesh sleeve pocket.Two front utility pockets with organizer sleeve.HYDRATION compatible. Hydration system ready and drink tube exit hole on top. Contoured shoulder straps with quick release sternum strap and waist strap.

5. HDE Military Backpack Expandable Lightweight 20L MOLLE Outdoor Rucksack (Digital Camo) (Click Link to Check Price on Amazon)
Editor's Rating : 9 out of 10
Durable nylon backpack suitable for anything from an intense hiking session to a leisurely camping tripFeatures a spacious main compartment with zip-up closure, interior zip-up and mesh pockets, and front storage zip-up compartments