Measure the stoma: Measure the stoma using the enclosed stoma measuring guide and select the proper size ConvaTec Moldable Technology Natura skin barrier. Take skin barrier out of package: Remove the skin barrier from the package but do not remove the clear release liner on the circular adhesive cover backing or the white release paper from the flexible fabric collar. Roll and press: To personalize the stoma opening, place your thumbs (or fingers) at the center of the starter hole and begin to roll the adhesive back. Remove liner and place on skin: Find the blue tab and remove the clear release liner from the skin barrier. Immediately center the opening over your stoma and press the skin barrier into place. Snug adhesive against stoma: The rolled adhesive part should gently snug the wall of the stoma. Therefore, if necessary, re-adjust the rolled adhesive back towards the stoma to create this snug fit. Press and hold: For optimal performance, press down on the rolled adhesive where it meets the stoma to ensure a good seal. Do this along the entire perimeter of the stoma. Then, hold the circular adhesive in place for at least 30 seconds to secure the barrier to the skin. Remove white tape border: Remove the white release paper from the Hydrocolloid Fabric Collar and press against the skin, smoothing out any wrinkles. Prepare Pouch: Before attaching the pouch, allow a small amount of air to enter the pouch by gently separating it. Align rings and snap together: Align the plastic ring on the pouch with the ring on the skin barrier. Press the two rings together beginning at the bottom 6 o'clock) working your way up to the top of the ring. Managing the Hydrocolloid Flexible Fabric Collar During Wear.