Osprey Aura 65 Women's Backpack

This is an amazing backpack for 3-4 day trips. I've taken it for a lot of backpacking trips and it has a great fit so that it sits on your hips. There's also a lot of straps so you can figure out the best configuration for your tent, sleeping bag, and sleeping mat for long hikes to your campsite. Invest in a great backpack!