Strong Material Waterproof outer shell that resists cracking and deformation, paired with high-elasticity EVA properties for durable use during high-intensity workouts while maintaining elasticity over time. Enhanced Pressure Resistance Robust internal PVC core provides structural stability and long-lasting support, handling loads up to 150 kg across a range of fitness activities. Smooth Rolling Action Targets fascia points with steady pressure to support fascia-focused work and promote faster muscle recovery during use. Wide Applications Suitable for pre-training warm-ups to balance energy output and post-exercise relaxation, with versatile compatibility for yoga practices and fitness regimens. Use scenarios - Pre-workout activation: roll calves, quads, and hips to warm up and improve mobility before running or lifting. - Post-workout fascia release: roll the back, glutes, and shoulders to ease stiffness and support recovery. - Yoga and mobility sessions: integrate into stretches to enhance range of motion and balance.