The TR5 (TR501) SPD-SL Triathlon Shoes gives you a high-end Triathlon performance shoe at an entry level price.  It s got some great features to keep you in comfort and to help speed up transitions and optimise power transfer.Supple synthetic leather and 3D moisture control mesh uppers with a quick-dry interiorReversed strap closure and heel strap for fast transitionsStrap position keeper for faster entryShimano Dynalast secures the foot into the ideal ergonomic position for a more efficient up-strokeLightweight glass fibre reinforced-polyamide sole & SPD-SL and SPD cleat compatible Shimano have put a lot of research into their Dynalast technology which means you get a superior shoe with an optimised toe-spring section that gives you a smoother, more efficient pedal stroke.  The feedback on this technology from pro riders is that Dynalast helps to reduce energy loss which is key for those longer rides. The TR5 has exceptional breathability thanks to the 3D moisture control mesh upper a