Thanks to the extra buoyancy in the hips and thighs used during training, you'll see a beneficial increase in core stability and assisted hip rotation to improve pool workouts and swim times. These high-quality swimming shorts have been designed with the help of Swimsmooth and Professor Huub Toussaint, a combination of knowledge unrivalled in the world of triathlon swimming. HUUBIl has been designed with SwimSmooth's exclusive X-0 Skeleton for improved body alignment and swimming efficiency. Designed and developed with SwimSmooth. Kick and body alignment training tool. High-quality neoprene. Wetsuit buoyancy improves kicking.