Purchased for around 3000 yen on Rakuten. Land-bag shoulder strap cover. Highly-rated product with a 4.6 rating on Rakuten reviews. I received one as a gift, and it overlapped with the one I bought myself, so I'm selling the one I purchased, which I only tried on once and is unused. It has thick cushioning, and according to my child, their shoulders don't hurt. Land-bag shoulder pads, shoulder pads for land-bags (for both shoulders), shoulder pads, reduces shoulder weight, light, lightweight, helps, convenient goods, shoulder belt, belt, belt cover, cover, popular, recommended, convenient goods. School, school entrance preparation, graduation, elementary school students, children, kids. Seiban, Fit-chan, Tenshi no Hane (Angel's Wings).