Pattern - Thread Theory - Cosmos Trunks Romper Sewing Pattern and uniquely designed inset pockets

and uniquely designed inset pockets for added practicality

The 53" width offers generous yardage for creating flowy dresses

the Isle Jeans pattern is beginner-friendly—complete with a detailed sew-along guide for step-by-step support

rayon jersey

eco-conscious formula that’s tough on dirt but gentle on fibers

Pattern - Thread Theory - Cosmos Trunks Romper Sewing Pattern and uniquely designed inset pocketsThe Thread Theory Cosmos Trunks sewing pattern is designed for a form fitting, comfortable boxer brief that moves with you. Featuring no center back seam, a reinforced inseam gusset, and a shaped front cup, these trunks fit like a second skin without rubbing or shifting. Short, athletic legs and a smooth elastic waistband create a streamlined silhouette suitable for wearing under slim fit pants, gym shorts, or casual wear. Ideal for creating a