Versatile poolside and outdoor training tool designed for rehabilitation exercises, outdoor group training, and general fitness. It combines resistance training with the ability to work in water or water environments. Adjustable resistance from 500 ml (1 lb) to 2500 ml (5 lb) per dumbbell. This allows you to tailor intensity for strength building and progression over time. Hydration management during workouts. The design supports quick access to water between sets, enabling hydration management while performing pool workouts or outdoor sessions. Five color options to suit an active lifestyle, while maintaining structural integrity in environments from 0 to 40 C. Built to perform reliably across varied conditions. Clear fit for a range of users. Ideal for fitness enthusiasts, patients undergoing rehabilitation, and outdoor athletes seeking a practical, dual function gear for strength and hydration. Practical use scenarios Poolside rehab and aquatic therapy: perform resistance exercises in the water to support joints and muscle groups while easily managing hydration between movements. Outdoor group training: use the adjustable weight for team workouts or bootcamps near water, with color options to differentiate settings or teams. Home or travel workouts: compact, adjustable resistance for versatile routines that require waterbased weight changes and hydration access during sessions.