Made of polyester. The smooth polyester fabric is lightweight, comfortable and quick dry. The silky smooth mesh lining offers all the extra support your boys need during any activity at the beach, pool, or if they are just lounging around. Your boys can spend an entire day wearing these cute shorts.Good quality ,extremely durable and comfortable. Made of comfortable quick dry fabric, your boy could easily feel how great it is when they wear these swim trunks.These boys boardshorts are suitable to wear anywhere such as for swimming, surfing, playing, drifting, in the beach or pool.The cute style will be on full display with this cool and comfortably fit boy's swim trunks with lovely dinasour and shark prints. they will make your style come alive with its unique patterns.S size is suitable for children between 90-100cm in height.M size is suitable for children between 100-110cm in height.L size is suitable for children between 110-120cm in height.