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sigma.proprietary has been a member of Linktree for less than a month and joined in October 2026. The social media accounts linked to from sigma.proprietary are: • TikTok Besides social media accounts, Sigma.Proprietary has populated their site with a Shop. Within the sigma.proprietary shop, you can find: • COOGI Australia Vintage 3D Textured Knit Sweater Multicolor SS Crewneck Made AU Explore the products within their Shop page for merchandise.