When I was looking for wading boots, the rock grips were at the top of my list. I checked out Simms, however they were too wide for my foot. I wanted to get the rubber soles because I do a lot of walk and wade fishing. However, no shop had the rubber rock grips in stock. They were all on backorder and they were getting ship times around July. Maybe things have improved. I went with felt river walkers, and have been happy so far. Anyone seen them in sticky rubber patagonia's in stock in Calgary?