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I Love Math Classic Thong I Love Math, where the heart is actually a cardioid on polar coordinates. r=1-sin theta. For the math nerd or teacher. $10.95 Size:  Size Chart Small Medium Large Qty:    AVAILABILITY: Product Number: 28308550 Product Information Fit: Form Fitting Body-hugging close contoured fit. Size up for a looser fit. Fabric Thickness: Panty-minimalists love our casual thong that covers sweet spots without covering your assets; putting an end to panty-lines. This under-goodie is "outta sight" in low-rise pants. Toss these message panties onstage at your favorite rock star or share a surprise message with someone special ... later. 5.8 oz. 100% Ultra-fine combed ring spun 1x1 baby rib cotton Size up for a looser fit Super soft high end woven elastic trim Made in the U.S.A.