1：New generation of fabrics: 4 ways stretch.The swim trunks use 4 way stretch which is stretch ,smooth,lightweight and quick-dry.Based on the above features,you will fell very comfortable when you wear it to swim,beach,running or daily home wear.It can protect your skin from chafed. 2:Elasticized waistband with drawstring. The swimsuit is elasticized waistband with adjustable drawstring. You could adjust your waistline freely and never sag or slip down when you swimming, surfing, running, ball sports etc. The side pockets adopt mesh fabric to facilitate water and sand drain quickly. The velcro tape back pocket could automatically close the pocket without manual control, which is more convenient and safe than the manual zipper and button pocket. 3:US size and style with well-cut workmanship.Relax fit, Above knee length(18-20 inch outseam), Three-dimensional cut, bring you comfortable feeling,the most stylish,cool appearance and performance. US Standard size with 5.5 inch inseam. Small:Waist:28"~30",Medium:Waist:32"~34",Large: Waist:36"~38",X-large Waist:40"~42". 4:Occasion and Guarrantee: This mens bathing suit is perfect for both indoor and outdoor activities. Such as: swimming,surfing,running,gym,casual wear or relax in the beach or just at home. The boardshorts is Great gift for Son,Boy friend,Husband or Dad.We are confident in our design and quality, we believe that you must be surprise for this upgrade swim trunks, you completely don't worry about the quality as we can give you up to 6 months quality warranty. What are you waiting for? But it now!