"Elastic cuffs" refers to the elastic bands or strips at the ends of sleeves or pant legs that help hold them securely in place and provide a comfortable fit.
This long sleeve mini dress with a red floral print throughout features a lace - up collar and elastic cuffs in a shift silhouette with lined. (zaful.com)
The long sleeves and elastic cuffs give out a more fuller appearance. (zunera-serena.com)