From Helen's Closet:
The Avery leggings are the ultimate leg layer. They are simple to sew while still featuring unique details that make them special. The Avery leggings have no outer leg seam, so you have a nice smooth leg for layering. They have a crotch gusset for improved range of motion that also reduces bulky seams. Each view features a waistband and waistband facing with a fully enclosed and stabilized elastic, ensuring your leggings won’t fall down. Try view A for a classic look or view B for an ultra-high waist and extra-long legs. The Avery leggings can be worn anywhere from yoga to the workplace and are a great wardrobe staple.