Specializing in Turkish cotton beach towels and coastal lifestyle goods, Irrational Certainties operates from Kettner Boulevard in downtown San Diego's Little Italy under its Citizens of the Beach brand. The product line extends beyond towels into decorative throw pillows, wall murals, and stationery, overlapping with the curated home-goods inventory at Comman Goods in the downtown district. The towel collection comprises more than 20 base designs produced in over 100 color variations, all manufactured from sand-free, quick-dry Turkish cotton with high absorbency ratings. Decorative pillow and wall-mural lines extend the brand into interior-furnishing territory, a home-design category also served by Mobiliti Interiors in the same neighborhood. The flagship towel line utilizes flat-woven Turkish cotton engineered for sand-release performance, high absorbency, and accelerated drying time, produced across a 100-plus-colorway matrix spanning the full 20-design catalog.