Sure to be her new best friend this winter, the Spyder Girls' Mimi Overall acts as an impenetrable defense against rain, sleet, and snow, while also keeping her toasty warm thanks to 3M Thinsulate insulation. With critical seams taped, the Mimi also boasts a HydroWEB laminate for waterproof, breathable protection at the resort, and 3M Thinsulate insulation throughout uses microfibers that efficiently trap heat and reflect radiant body heat back to her for cozy comfort in frigid temps. Zippered inner thigh ventilation systems allow he to dump excess heat quickly if she overheats, while the inner snow gaiters with gripper elastic and cuff anchors help keep snow from sneaking in. Spyder also integrated a Small To Tall adjustable system that actually extends an additional two inches when its stitch is released to accommodate growing kids. Plus, the adjustable shoulder straps and waist let her customize the fit for just the right level of snugness.