The Osprey Atmos AG 65 is excellent for backpacking/hiking with moderate to heavy loads in comfort. The anti-gravity (AG) system spreads the load well through the hips and reduces the weight you feel. Size is ML/XL as shown in the photo, which fits me well as a 5'11" man, but please refer to the size guide on Osprey's website. The pack is in excellent condition having only been used just a few times, and I am reluctantly selling it to make space for a smaller capacity pack. Please note that the hip belt adjusters are shortened to reduce the amount of spare strap when worn - I can provide additional details/photos of this if helpful.
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