Knotted,

I'm not worried about bumping into metal, I have bruises all over my body from bumping into various parts my bike and the ground. However, there are fairly sharp metal edges on the Brooks' underside and I'd rather not cut my finger off.

Also, after multiple Proofide applications, top and underside, my Brooks is NOT weatherproof. My understanding is that Proofide is water repellent, not waterproof, and that has been my experience.

Cathy