I stop wearing hunting cloths when my wife chucks them out...which isnt often...no longjohns but us K1W1s are often seen in polyprop equivilents with rugby shorts over the top to keep things seemly...works all year round,stops sunburn in summer and keeps you warm in winter. they very susceptible to rips n tears,they dont patch well..polarfleece will work but goes all baggy.
Ive got a set of polarfleece pants that are one of the first commercial sets made... they are still going strong,must be 40 years plus old.