Sequential determination of individual renal function in atherosclerotic renal artery stenosis

A stay dry collar is provided to prevent wetting of a customer's clothing around the collar during shampooing or other beauty salon operations. A thermoplastic polymer sheet having moisture barrier properties is provided with score lines defining an inverted V-shaped configuration. The score lines arranged in the inverted-V permit separation of the sheet along the scores to define a center tuck flap and left and right tie panels. After separation, the central tuck panel may be tucked between the customer's clothing and the customer's skin. The left and right tie panels may be gathered together, brought to the other side of the person's neck and then tied to secure the stay dry collar in place. The central tuck panel has a length sufficient to provide meaningful three-sided protection for preventing undesirable wetting of a customer's garments during and after shampooing or during other beauty treatments. The stay dry collar is intended for sanitary, one time disposable use and reduces the expense associated with extra towels and laundering of the towels in beauty salon operations.