Sewing a triangle gusset on leggings doesn't have to be hard. This method requires only three quick easy steps to attach the gusset.
Gusset Tutorial
Add a Gusset to the Hana Bottoms – Greenstyle
Suit Pants Day 2 or The Botched Crotch
Sewing the Crotch and Inseam on Leggings: Aila Sew-Along - The Last Stitch
The easy way to sew a triangle crotch leggings gusset: Aila tutorial
Gusset Tutorial
Dresses of Vainakh Women (Late 19th Early 20th Centuries
Eivy Sew-Along: Adding a Band to Cover the Neckline Seam - The
The easy way to sew a triangle crotch leggings gusset: Aila
The easy way to sew a triangle crotch leggings gusset: Aila
How to add a gusset to a legging pattern - Life Sew Savory
Sewing the Crotch and Inseam on Leggings: Aila Sew-Along - The