One and done! This long-sleeve romper is the best new take on a workout onesie. With a square neckline, longs-sleeves (with thumb holes!) and detailed seams throughout, the Allister Romper is perfect for a legit workout -- or at least looking like you did one. Square Neckline 3" Inseam Long Sleeve Seaming Details Around Waist Seaming Details At Bust Size XS-XL 70% Polyester 30% Spandex Style # AALLJU24 Model Measurements: Anna, size S - Height 5'9, Bust 32", Waist 23", Hips 34.5" Jessica, size XL - Height 5'9, Bust 45", Waist 34", Hips 48"