With online shopping being a rage and Amazon in with their honesty and trustworthiness I would suggest that you go for what they have to offer. I did some search and found this item which I feel will suit your needs. Here are the details:
Attache 1025R Rucksack, Hiking Backpack 75Lts (Navy Blue) With Rain Cover
Here are more details
This 70 litres Rucksack from Attache has padded shoulders straps for comfort, internal pockets to store your gear, and a metal stay for comfort and back support around town or on the trail. Its slim shape provides freedom of arm movement and stability in situations requiring good balance. The sack bends and twists with you, giving a greater degree of balance; its technical back system is designed for alpine sports and high-grade routes. The soft, specific pressure zones ensure exceptional load /carrier contact. The shoulder straps are also adjustable. These attractively designed packs cover a range of uses. With a range to cater from the summer walker to winter climber or mountaineering. These packs reflect the same attention to design materials and workmanship that is present in our other models; it can be used efficiently under varying circumstances and conditions to assist you in all your outdoor activities. Product Features: 1. Dimensions (CMS): Length: 77, Width: 42: Height 80 2. Laptop Sleeve 3. 7 Ways height adjustment system. 4. Metal rod stay for comfort and back support 5. Sack opening for main compartment 6. 4 Zipper Pockets 7. Dual Pockets on Hood 8. Detachable shoe compartment from inside 9. Buckle Pocket on the hood 10. Fiber padded cushioned back 11. Adjustable Hip belt that helps in weight division from shoulders 12. Expandable sack for extra space 13. Adjustable Sternum Strap that helps in keeping the shoulder belts in place. 14. Waterproof material 15. Additional Bottom compartment for used cloths and shoes 16 Two Zip Pockets at Hip Belt.
