4 season sleeping bag with removable layers?

i believe in 2009 i was at a sportsmans expo in phoenix arizona and i had collected quite a few business cards and such, the one product i was unable to get a card (they ran out) was a company that makes a really cool sleeping bag, the outer layer looked to be canvas, depending on the temperature outside you could remove layers to suit, anything from arctic type weather to a nice warm spring trip. any ideas out there as to what the product's name or company's name is? thanks you guys