What fabric is my medium size olive/coffee/olive tote?

I just bought a Timbuk2 medium sized tote on eBay. It was described as olive/coffee/olive. What type of fabric is it? No tag. I cannot find this color combination on your website which makes me think it's an older bag (maybe a 2006-2007 design). I cannot find a tag on the inside that says anything about the fabric of the bag. Is there anyway you can tell me what type of fabric it is?