Dowa, It appears to be made of a rubber/plastic? material. I did notice a smell the first time I used it, but I think it was because it had been stored for awhile. I got it used on ebay. I am also VERY sensitive to smells and it hasn't bothered me.
KeepHope, You could probably fit in the XL, but I think unless your torso is really long the Large would work for you as well.
2001 symptoms started:
Tingling in fingers and toes both sides, not tested at that time for LD
2007 Summer tested pos. WB, diagnosed with LD, tested neg for co-infections thru Igenex
Abx - Doxy 100mg 2x/day for 3 weeks (before diagnosis)
Amoxicillin 1gm 2x/day for 1 month
Amoxicillin 1gm 3x/day with Probenecid 500mg 2x/day 5 months
Currently on Dr. Zhang's protocol