The answer depends entirely on which definition of shoshonemen the user chooses to ascribe to.
If one thinks in a traditional sense, the shoshonemen are a reclusive organization of ancestrally related men who make their homes in the frigid wastes of the Andes mountains. Therefore no, they are not made of leather leggings and buckskin shirts.
If you accept the modernized definition of shoshonemen as "the shoe of a man who is a shoemaker" then theoretically yes, shoshomenem were made of leather leggings and buskin shirts, or more accurately, the remains of those items of clothing.
I highly suggest you perform additional research and choose your side wisely, as the two definitions harbor their own dedicated sects of followers that, at times, clash violently due to the differences in their beliefs.
Omaha men wore buckskin shirts, leather leggings and breechcloths. Omaha women wore dresses that were made from deerskin. The children wore the same depending on if they were a boy or girl. They also wore moccasins on their feet.
Women wore buckskin dresses and the men wore leather shirts with breechcloths.
The woman of this tribe wore deerskin or elk skin dresses while the men wore buckskin shirts and leggings. They made and wore moccasin shoes.
Men can wear leggings with T-shirts.
He wore simple buckskin shirts.
moccasins and buckskin shirts
The men wore deerskin shirts and leggings. When it was cold, they'd wear breechcloth. Women, on the other hand, wore bark made from trees to make skirts and shirts. They'd weave the bark into clothes. Women would make skin wraps when it was cold.
They wore shirts and deer skin leggings.
In cayuga some womens wear skirts and shirts with shorter leggings and mens wear breechcloths with leggings.
leather
Men:wore fringed shirts, breechcloth,leggings,gloves, and moccasins.
The Sioux wore a variety of different kinds of clothing. The men wore shirts, leggings, breechcloths, and moccasins. Deer skin was used to make shirts and leggings. In warm weather or when they were hunting buffalo, men wore only a strip of leather (breechcloth) and a pair of moccasins. A knife sheath and a small bag for face paint (for clan tattoo) might also hang from the belt. Women wore long dresses and leggings every single day and wore dresses with decorations for special occasions. The children wore mostly the same things as their parents. In warm weather the boys wore breechcloths. In cool weather they wore shirts, leggings, and moccasins. Girls wore dresses, leggings, and moccasins. All Sioux wore buffalo robes to keep warm in the winter. I swear this is a very good answer!