Improve grip, increase hand flexibility, and support recovery with these PU squeeze balls featuring delayed-rebound sponge technology. Designed for comfortable, controlled training and easy everyday use. Key benefits Controlled resistance and improved muscle engagement: Delayed rebound sponge technology provides slow, steady compression that trains grip, finger, wrist, and forearm muscles without abrupt rebound. Comfortable for extended use: Made from PU material with a soft, delicate feel that resists fatigue during longer sessions and suits frequent use for conditioning or rehabilitation. Truly portable: Small, lightweight design fits in pockets, purses, or backpacks for convenient access whenever you need a quick exercise session. No additional equipment required: Use them anywhere to strengthen the palm and forearm or to maintain mobility during recovery and sport training. Main features Function: Rebound sponge action enables a variety of hand postures and grip types to target different muscles and movement patterns. Material: Durable PU with slow rebound properties for a balanced combination of comfort and resistance. Performance: Effective for both strengthening and flexibility exercises; suitable for repeated daily use without rapid wear. Compatibility: Simple, standalone tool that works with standard hand and finger exercises—no straps or attachments needed. Practical use scenarios Sports conditioning: Include in warm-ups or cooldowns to enhance grip strength and forearm endurance for racket sports, weightlifting, or climbing. Rehabilitation and hand therapy: Use during recovery from strain or injury to rebuild strength and range of motion under a therapist’s guidance. On-the-go maintenance: Keep one in your bag for brief strengthening or mobility sessions at the office, during travel, or while outdoors. What you can expect Gradual, repeatable resistance that supports progressive training A soft, non-abrasive surface that stays comfortable with frequent use Easy storage and transport so you can maintain a consistent routine Use responsibly and consult a healthcare professional for post-injury rehabilitation programs.