Cotton spandex rib knits! Expect for the mustard that’s a brushed sweater rib knit, and the top lilac is a rayon spandex rib.
In order here’s the weights and stretch
Lilac: 10 oz 50/25
Peach: 13 oz 100/50
Mint: 10 oz 75/50
Dusty Sage: 13 oz 75/25
Plum: 13 oz 75/25
Slate blue: 13 oz 75/25
Royal: 13 oz 75/25
Mustard: 13.5 oz 75/25
Brown: 13 oz 75/25
Black: 10 oz. 50/25