Awhile back, I remarked that I was having a heck of a time with a pair of Simms G4 Guide Boots. They never did feel right and caused a lot of aggravation to the outer ankle bone. More than once I was hobbling back some distance to the rig. Because of the excellent customer service at The Caddis Fly Shop in Eugene, Oregon, and Lou Verdugo, I made a trade of sorts for a new pair of Simms boots, the Guide Boot. Wow…what a relief. I ache enough with other maladies, so no pain in the feet is wonderful. (Best wishes to Lou!)