【HumminGuru Design】: HumminGuru comprises a team of dedicated audiophile enthusiasts who deeply understand your needs. We have redesigned our Vinyl Record Jackets, Inner Sleeves, and Outer Sleeves, paying meticulous attention to every detail. Our unwavering commitment to quality ensures that your cherished collection will be preserved and enjoyed by future generations for many years to come. | 【High-Density Material】:7" Inner Record Sleeves are made from High-Density Polyethylene (HDPE) material with a thickness of 1.5 MIL, providing the durability and archival-grade protection against dust, dirt, and static. | 【Acid-Free】: HumminGuru Acid-Free LP Inner Sleeves prevents label discoloration over time and vinyl deterioration, ensuring they remain in pristine condition. | 【Anti-Static】: Anti Static Record Sleeves are made with the latest HDPE material, the inner record sleeves are designed to be anti-static, preventing pops, crackles, and static-related damage to your precious records by attracting harmful dust and dirt. | 【Round Bottom】: Round bottom record sleeves design allows for easy insertion and removal of vinyl records. Round Bottom Vinyl Inner Sleeves are optimally designed to perfect fit a single 7” vinyl record.