BIOSTEP COLLAGEN DRESSING, 5 X 5 CENTIMETER, SOLD AS 1/EACH SMITH 66800124 1/EACH -668001241 EACH Smith & Nephew's Biostep is a collagen matrix dressing that allows you to overcome barriers to wound closure while maintaining an optimal moist wound environment. It targets and deactivates excess MMPs and has a 6 day wear time for prolonged control of the wound environment. The highly conformable dressing is easy to apply, and its gelling actions provide a cooling, soothing effect for enhanced comfort. 5 x 5 centimeters SKU: 66800124 MCK