Mobile Fidelity Outer Archival Record Sleeves (Pack of 50) Protect Your Investment and Prevent Disasters: Archival-Quality Mobile Fidelity Sound Lab Record Outer Sleeves Keep Album Jackets in Pristine Condition Widely hailed as the best product of its kind, Mobile Fidelity Sound Lab's Archival Record Sleeves are "clearly" superior. These sturdy, 4-mil thick outer sleeves are made from polypropylene, which makes them more transparent than polyethylene sleeves. Besides providing rock-solid protection from dust, hair, and other debris, these sleeves allow you to enjoy eye-popping album graphics with more clarity. The 4-mil thickness affords stellar archival safekeeping, providing protection against scuffs, wear, denting, dirt, and the moisture that can travel on fingertips. Consistently.
