in theory, yes. Cashmere does not hold lanolin the same way wool does so it's not as leak resistant. I've made a few and they're fine for day use, but definitely not for night or nap. The other thing about cashmere is that it is much warmer than wool, which can be a good thing, but just something to keep in mind. I've also had a hard time keeping them up, but I think a drawstring or some elastic would fix that problem.