Inflatable pillows make lounging at the beach even more relaxing, and they're easy to tuck into a tote. Add a terry cloth slipcover, and the plastic pillows will feel soft and dry, not hot and sticky. To cover a 14-inch square pillow, you'll need a 15-inch square case. Cut a 32 1/2-by-16-inch rectangle from a towel, using a finished edge for one of the short sides. Finish other short side with a 1/2-inch hem. Place fabric wrong side down, with hemmed edge on right. Fold over left edge 7 1/2 inches toward center. Fold over right edge 9 1/2 inches toward center (it should overlap left edge by 2 inches). Pin, and stitch along open sides. Turn the cover right side out, and insert the inflated pillow.