Miami Missionary Tent Co.13 oz vinyl:The 13oz vinyl film we use was developed especially for us and has been improved many times since 1980. It is custom made for us at a 90" width. We use this for our round/oval tents only. The idea was to develop both a high quality and affordable vinyl. Although it is just a 13oz vinyl, it's tear strength and sun life match that of a much heavier vinyl. The width of the vinyl allows us to have fewer seams which speeds up production time and lowers the cost. Now our customers around the world can purchase a new tent at a used tent price.