We carry E. Gerber Standard size Mylites in 1.42 ml, 2 mil and 4 mil thickness. The 1.42 mil thickness are the Mylites+ brand. If you like a loose fitting sleeve that still provides top of the line archival protection, these are for you. The 2 mil thickness are the Mylites2 brand and are the most popular thickness among all the sizes we carry. The 4 mil thickness are the Mylites4 brand and are popular for collectors who prefer a rigid comic sleeve.