High-quality wetsuits are usually made from neoprene, have good sealing (like gaskets for the zipper and chest), ergonomic design, thermal insulation, flexibility, and durability. They might also use advanced materials like Yamamoto neoprene for better elasticity. Other features could include seamless construction, reinforced stitching, and proper fit based on body type and water conditions. Brands like Xtralight, Fourth Element, or O'Neill are known for high-end wetsuits. Maybe Raisa is one such brand or a line from them.