▁difference ▁is ▁a ▁high ▁sp ray ▁col lar . ▁Some ▁have ▁h ood s , ▁often ▁in ▁a ▁high - visibility ▁colour ▁to ▁increase ▁visibility ▁if ▁a ▁wear er ▁falls ▁over board . ▁Ret r ore f lect ive ▁patch es ▁are ▁also ▁strateg ically ▁placed , ▁and ▁jack et ▁t ails ▁are ▁extra ▁long ▁to ▁keep ▁water ▁off ▁the ▁legs ▁and ▁out ▁of ▁the ▁joint ▁where ▁water proof ▁tr ous ers ▁meet . ▁ ▁O il sk in ▁tr ous ers ▁– ▁also ▁known ▁also ▁as ▁" bib s " ▁– ▁are ▁very ▁high - cut ▁to ▁provide ▁a ▁large ▁overlap ▁with ▁the ▁jack et . ▁They ▁are ▁held ▁up ▁by ▁shoulder ▁stra ps , ▁and ▁typically ▁feature ▁stra ps ▁around ▁the ▁bottom ▁of ▁the ▁legs ▁to ▁cin ch ▁around ▁se ab o ots . ▁ ▁This ▁semi - w at ert ight ▁se al ▁does ▁not ▁allow ▁them ▁to ▁be ▁used ▁like ▁fish ing ▁w aders , ▁but ▁a ▁wave ▁swe eping ▁briefly ▁across ▁the ▁deck ▁will ▁generally ▁be ▁kept ▁out . ▁All ▁but ▁the ▁che apest ▁br ands ▁are ▁rein for ced ▁across ▁the ▁seat ▁and ▁kne es . ▁▁ ▁In ▁moder ate ▁weather ▁often ▁only ▁the ▁tr ous ers ▁are ▁worn . ▁Although ▁a ▁few ▁all - in - one , ▁bo ilers uit - sh aped ▁oil sk in ▁su its ▁are ▁available , ▁most ▁sail ors ▁prefer ▁the ▁flex ibility ▁of ▁a ▁separate ▁jack et ▁and ▁tr ous ers . ▁ ▁The ▁cu ff s ▁of ▁better