James Perse Long John Sweatpant in Black. - size 26 (also in ) James Perse Long John Sweatpant in Black. - size 26 (also in ) 100% cotton. Internal drawstring waist. Button fly. Side slant pockets. Back welt pocket with button closure. JAME-WP232. WHVJ1735. James Perse started out by making the perfect baseball cap; film directors ordered hats for their cast and crew and record labels bought them for tours. In 1994 he launched a t-shirt line that rapidly gained loyal fans looking for a seamless blend of luxe and casual. James personal design philosophy and aesthetic is low maintenance high fashion, emphasizing elegance and comfort, pairing sophistication with simplicity.