Simplicity Sewing Pattern 3079 (A) Babies Bodysuits, Shorts and Pants. Button front onesies have fold back collar, double back yoke cut on cross grain, long or short sleeves and snap tape closure. View B has front pocket with turnback inserted and button detail. Onesies can be worn with clip-on bow tie. Pull-on shorts and pants have elastic at back waistband, wide belt loops and faux fly opening.