I returned a pair of Izumi's as they were extremely small for their XL size rating. The ankles were too tight. I've had two pair of Triflex tights over the last 10 years and love them. They wear and wash well. The ankles accommodate thick socks and the zippers still work after a hundred washings. There is ample flex at the knees and seat. You can find them for around the $50 point if you watch for sales.