UNi-PRO You Can Do It 270mm microfibre roller covers in a handy 3 pack. You Can Do it Microfibre covers combine quality components with trade fabrics to give you maximum performance and professional results. 15mm nap Microfibre fabric is ideal for use on walls and ceilings and is suitable for use with flat, low sheen and satin paints. Handy Tips: If you are painting overnight, make sure you wrap up your paint roller covers in cling wrap, so they don’t dry out. They can then be reused the next day to finish off your painting task. When painting a room always start on the ceiling and then work your way down from there. Ceiling, walls, trims and finally doors.