I selected the Pana forum because I'm using a GH3, but this works for all m43 cameras. I've been using a "Lowepro Photo Sport Sling" all summer for medium killer day hikes up to 8 miles and it works great. After a while, and especially on the down part (this probably results as much from age, fatigue, and muscle stress as from design), my right shoulder starts to get a bit sore. But having grown up in the mountains (in the "pre-goretex" era), it works great. Light as light can be. For tramping around (including in cities) I can't imagine a better quick-draw pack and it holds my jacket, lunch, water, and whatever else quite comfortably. I just bought, in anticipation of shooting throughout the fall and winter, the "photo sport 200 aw" which is slightly larger and a balanced backpack. The same easy access camera pocket, but with more space for layers and food. Absolutely no connection to Lowe, but credit where credit is due.