J.Crew Seaside Short in Indigo Stripe. Size M. Our seaside shorts—based on our customer-favorite seaside pant (beloved since 2015)—are crafted in a supersoft, drapey TENCEL™ lyocell (an eco-friendly fiber produced from wood pulp sourced from sustainably managed and certified forests—meaning not ancient or endangered!). With a drawstring waist, they're destined to be your warm-weather go-tos for many seasons to come. Cotton/lyocell. Pockets. Machine wash. NWT.