I bought 3 pairs of Teva Rincon Model 6150's about 10 years ago. I'm still wearing the first pair. They had the river rubber soles and in some spots have worn thru to the pad on the heels, But by that, they have just worn to the pad at the very back edge of the flip flop. Never imagined those would be so durable. At the time, Ross sold them for $ 10 a pair, so for $ 30 & tax, I wound up with 3 pairs,when $ 25-40 would've been what a single pair of Reef Brazil and the newer model of Teva's would've cost. I prefer the older model, they have a tougher deck and sole for durability with the heavier gauge and double layered nylon straps. Incredible durability.