PROLAST® Unfilled Four Foot Heavy Bag - This Made in USA Heavy bag is ready for your hard-hitting workouts. Increased size is perfect for advanced athletes. Shipped same day you place your order. PROLAST® Which stands for "Professional Products Made To Last" is thee "CHOICE OF PROFESSIONALS". This is the Best Standard sized Middleweight Punching Bag on the Market! Ideal for all-around full contact punching and kicking. Not a cheap import! Constructed in the USA from the finest materials by PROLAST®. Features a shell of heavyweight RIP-STOP® Technology impregnated material, quadruple-stitched along all stress seams. Resists weathering, stains, etc. Top hanging straps are heavyweight industrial webbing and run the entire length of the bag. Each bag is hand-stuffed with a custom blend of materials (no sawdust or paper!) Won't settle! All bags are hand-inspected and come with a FREE LIFETIME Warranty against defects in workmanship and materials.