I use Gun dog supply for quite a few things and the service is great - I ordered a Dokken duck on Saturday and it arrived yesterday 
I have a center ring biothene/durasoft type collar that B uses for swimming. Great collar for wet activities!
as an alternative I have a collar like this and I use a Boomerang tag for it "Double Thick Nylon and Leather CollarTags™" and that fits tightly on there but is easily removed to go on one of his belt style nylon collars.
I really like the Boomerang tags and since B has a bunch of collars I like having the ability to move his tags around
We use the Collar tags for adjustable nylon collars and in all his insanity, playdates, wild antics etc have never lost a tag they all are like new
BTW I love that plain leather collar - I got it at a farm supply and we have hardly used anything else since.