De Soto Men's 400-Mile Bike Short To improve the durability. Yes, this fabric is more durable, which is important in an area where rubbing occurs against a saddle and where some people's thighs rub together. To keep the modesty panel, well, modest. This fabric is not diaphanous at all (meaning not see-through). Something we all appreciate not involuntarily seeing on others. To make this trishort faster in non-wetsuit races. Liftfoil is De Soto's swimskin fabric. The Liftfoil Speed Trisuit is made entirely out of this swimskin fabric. The addition of these panels on the front and back not only makes this trishort faster, but they eliminate any adverse affects when worn with a wetsuit.