How to sew an elastic back waistband In the Folds Elastic Back Linen Blend Shorts Beige NA KD Elastic Waist Lightweight Cargo Short boohoo White Plain 45mm Knitted Elastic Roll, For Textile Industry at Rs 3300. A relaxed denim short with a cuffed roll hem and an elasticized back for comfortable ease. The Elastic Back Roll Short from Liverpool Shop is crafted in light indigo denim with utility style front seams and a mid thigh silhouette. Wear them casually with sandals or a tee for warm weather days.