Stylish cycling kit

Endura used to make a sonic-welded three layer tight - Stealth-Lite biblong waterproof bib-tights - if you can track down a pair, but was like riding in a wetsuit without the nice bouncy stretch of neoprene.

If the waterproofing is critical, go for a decent pair of overtrousers. More versatile to layer up as you need, and more comfortable in movement.