Selecting the correct rubber foam core is critical for performance. SBR (Styrene Butadiene Rubber) is the most cost-effective but has limited elasticity, making it suitable for cheap orthopedic braces or promotional items. SCR (Styrene Chloroprene Rubber) is a blend offering a balance of cost and performance, ideal for entry-level surfing wetsuits. For professional-grade diving suits, CR (Chloroprene Rubber/Neoprene) is essential as it provides superior insulation, high elasticity, and excellent resistance to seawater and ozone.