This weighted blanket is engineer to be 8% to 12% of your body weight. This 15 lb blanket is perfect for people between 125 to 185 lb. The 20lbs is perfect for 180-220lbs. The 25lbs is perfect for 230-250lbs. Do not use for children under 5 years old. Get even more value for your buck as this order the weighted blanket that can be fastened with corner ties to prevent any slipping. With the two part construction. The blanket is made with silky soft microfiber fabric. Hypo-allergenic, non-toxic and ordorless. .