As to lanolin allergy that's interesting as when I worked in tire plant there were many! that used it as dermatologist prescription for skin problems via rubber & chem contact problems.They look pretty good, but for me the lanolin content is a deal-killer...I'm highly allergic to it. Glad they work for you.
Here are the silicone ones I'm now using. Good question someone asked about pliability in the cold, but I think that can be dealt with by warming with your hands first.
http://www.macksearplugs.com/details/Motorcycle-ear-plugs/pillow-soft-earplugs-6-pair-value