I have a string suit I bought at the local Meijer a few weeks back. I believe the brand was bushmaster, the suit is three pieces, but I rarely wear the pants. It really breaks up the outline, and I feel like I blend right in.
Never used a burlap one, but my string suit picks up everything, I mean everything. That and the strings on it tend to clump/ knot together, making it feel like the suits not working, but I bet it would. For this I would recommend a burlap suit, but then again my suit is rather lightweight and did not make me sweat like crazy during the early season (80+ degrees).
If I remember, I will post a picture tomorrow.