As it is time for new worksite safety shoes, what are opinions or experience of the pros and cons of

toecaps made of the traditional steel, the increasingly popular 'composite' (i.e. 'Kevlar'), or

aluminium as a few models offer?

My work environment can be called 'light industrial', both indoor and outdoor, complying with health

and safety theory, rather than a realistic need. I want the most comfortable compromise of keeping my

toes warm on a winter morning but not sweaty on a summer afternoon.