The 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 functional, hand-made underwear wardrobe that combines comfort, style, and durability.
The Thread Theory Cosmos Trunks pattern is a form-fitting boxer brief with no center back seam, reinforced gusset, and shaped front cup. With short athletic legs and a smooth elastic waistband, this pattern allows sewists to create durable, comfortable, and stylish underwear for everyday or active wear.
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