I like the 20L it fits the BOMB tag bags perfectly and is nearly identical to the Kifaru meat Baggie (which the BOMB bags were designed for) but the STS is seam taped round bottom and roll top. Kifaru is a little taller by about 4" if I remember right. I sold my meat Baggie because even when seam sealed when you load it up that seam opens a little and it's not really waterproof.