Folding Umbrellas are also termed as Two Fold Umbrellas, Three Fold Umbrellas, Promotional Umbrella, Corporate Promotional Umbrellas. Folding Umbrellas are mostly preferred by companies who prefer to market or advertise their product on a large scale. There are two sizes in Folding Umbrellas, 21” and 24.5”. Companies prefer Folding Umbrellas because folding umbrellas are durable and cost effective at the same time. Folding Umbrellas can be made in polyester taffeta, nylon taffeta fabric.