This the absolute top-of-the-line suit we rec for triathlete's and open water swimmers interested in investing in the best that money can buy. The Ultimate IPS Plus is "ultimate" in everything that makes a wetsuit not just good, but excellent: flexibility, buoyancy, and speed. The placement of "air cells" in the suit gives you the buoyancy you need in exactly the right places. To be honest, we didn't think they could make the best any better... but the new 2025 model has a refined inner liner, and even thinner shoulder/underarm material for an even better flexibility rating. The increased shoulder mobility means a more comfortable and even faster swim on all course lengths.