cotton and silk panties and underwear are a must.In my opinion, wool and silk are best but natural fibers will always be in my fabric stash. Wool might stay wet but it will retain 80% of it's warmth. It is also more flame resistant (without treating) than cotton. Silk is warm but can also be lightweight.
Fabric warmth and durability is built into the weave structure.
wool panties....yea....be a revolt for history books i tell ya....!! need something soft against the skin and private bits.