PREMIUM QUALITY: High-quality punching bag filler sourced from textile recycling facilities, cleaned and shredded for optimal performance. MATERIAL COMPOSITION: Made from cotton, denim, khaki and polyester providing ideal density and resistance for training. SIZE OPTIONS: Available in 10 lbs, 25 lbs, 50 lbs and 100 lbs packages to accommodate different bag sizes and filling needs. SETTLING PROCESS: Material naturally settles after initial filling, may require additional filler for achieving desired density and firmness. FILL GUIDE: 80 lb bag needs 100 lbs fill, 100 lb bag needs 150 lbs fill, 150 lb bag needs 200 lbs fill, and 200 lb bag needs 250 lbs fill.