Sleevie Wonder (est. 2008) 3.5mil FROSTED INNER SLEEVES x50. Goes directly over any 12" vinyl. 3.5mil. thickness. HDPE = High Density Polyethylene. Looks great over colored vinyl. Anti static, flop free, and leech proof. Protects from dust, dirty hands, oily fingertips, & minor impact + abrasions. Acid & lignin free, archival safe. Orders go out within 24 hours, USPS (worldwide). Buy other sizes too : ) Support Sleevie best w/ multiple items @ checkout ♥