clothes only.
i buy multifunctional stuff to reduce over cost.
for example, i ride with lycra running parts, XC skiing tops and XC ski gloves. because I also run and XC ski that keeps overall clothing costs down.
i wear a gore-tex lined Adidas running shoe that i run with in the winter as well, which further reduces costs.
the most expensive input in biking is the extra food that i have to eat every day and the CR2032.
when one considers the environmental footprint of consuming an extra 500-1000 kcal/day, i actually wonder if i'm doing the planet a disservice versus using the subway