Monsoon Billie Wide Leg Beach Trousers Plenty of leg room. Perfect for slipping on over swimwear for daytrips to the beach, or styling with a top for drinks at the beach bar, these trousers are a must for every sun-drenched adventure. Designed with a stretchy embroidered waist, they're finished with XL wide legs for a fit so airy and comfortable, you won't want to take them off.