Refers to the act of rolling up sleeves.
Con el remangue de su camisa, estaba listo para trabajar arduamente en el jardín durante toda la tarde.
With the rolled-up sleeve of his shirt, he was ready to work hard in the garden all afternoon.
El remangue de su camisa era un detalle que le daba un aire desenfadado.
The rolled-up sleeve of his shirt was a detail that gave him a casual air.