Interior card sleeves. Fit perfectly into Ultimate Guard sleeves for maximum “sleeve in sleeve” protection. This product is completely free of PVC and acidic materials and therefore ideal for collectible cards. Reliable size consistency from sleeve to sleeve and from pack to pack. Optimized for tournament play. Non glare / non reflective surface on both sides for professional gameplay. Made of high-quality polypropylene, the industry standard for clearness and usability of card sleeves.