The Catalyst Tank from Under Armour® provides extreme support with an inside shelf bra and durable fabric, designed to keep you comfortable, secure and ready for a high-performance workout. Inside shelf bra. Back mesh panel. - Provides premium ventilation. Flatlock stitching for chafe-free performance. UPF 50+. Branded neck tape and loop for hanging. Anti-odor technology. -Prevents growth of odor-causing microbes. Hidden zip pocket on back. 360 degree reflectivity. Recycled lightweight knit. HeatGear® fabric. - Keeps athletes cool, dry and light. Body: 90% Polyester / 10% Elastane. - Mesh inserts: 100% Polyester. Imported.