Women's Christina Royale Blueblle Footbed Sandals The Christina Royale Blueblle Footbed Sandals are women’s casual thong sandals made for warm-weather everyday wear. They feature a smooth, minimal upper with a toe post and a slingback strap that helps keep the fit secure. A contoured, footbed-style sole and low platform profile give them an easy option for errands, travel, and relaxed outfits.