Sexy but modest in front and very revealing at the back, that pretty much is the large Jack Adams Sprinter 1.0 Thong (Grey/White). Grey panels trimmed in white cover the front and go around the back and the whole thing is held by a wide black waistband that bears the Jack Adams brand prominently. The front pouch of the Sprinter 1.0 has a keyhole fly for easy access. The soft fabric is a blend of 95% cotton and 5% elastane and it stretches to conform. The material stands up to repeated wear and washings much better than other undies in the market.