I've lowered the price since it got some likes. Type: Weight Vest You can adjust the weight by putting 38 weight bags into the pockets. The photo shows 15 bags in the front. Based on the total weight, each weight bag seems to be about 400g, and it appears to contain iron sand. My family bought it, but it seems they never used it. I searched the brand name, and AIFY is more expensive than other companies, so it seems to be a decent product. I'm not sure, so I've set the price like this. Regarding shipping: Shipping will be via Kuroneko Yamato. It will be shipped in a 100-size box, but it should be treated as under 20kg, so it seems to be calculated as 140 size. However, to avoid any trouble, please confirm this yourself before considering a purchase. Thank you.