Mystery Ranch Big Bop. Khaki green, olive green. Holds 2.5 to 3.5 liters (varies depending on the source) compared to the BOP's 1.5 liters, so there's plenty of space. See photos 7-9. There's still plenty of room even with all this inside: - Wallet - Coin purse - Tissue - Eco bag - 2 smartphones - 500ml water bottle - Lip balm, medicine, eye drops I own both the BOP and the BIG BOP, but I end up using this one more often, as bigger is better. In my personal opinion, the quality of materials and fabric in recent Mystery Ranch products has declined significantly, and I prefer the products from this era. There's no damage to the Velcro, etc., and it's still perfectly usable. It's barely noticeable, but I don't want to sell it without mentioning it, so I'll disclose the following: The last two photos show some slight fading, but it's barely noticeable depending on the angle, and I think it's not visible in the photos. I didn't notice it myself, and my wife pointed it out to me today. I'll lower the price accordingly.