From Amazon
GoBabyGo Original Non-slip Baby Crawling Socks | Anti-slip Crawling Support For Active Children | Bamboo Cotton | 6-12m (17-19cm) | Dark Blue
Luksusbaby.com
GObabyGO Bamboo Socks Antislip Dark Blue - 3-4 yr - bamboo
OnBuy
socks non-slip junior dark blue bamboo size 17/19