The wear-and-tear exemption to the warranty.
Because shoes worn for sports are likely to become dusty and go through some wear-and-tear, easy care is a plus.
Unfortunately, sometimes products break after the warranty expires, or the break is caused by wear-and-tear or use negligence.
You will expected to leave the premises in the same condition as when you took occupancy minus reasonable wear-and-tear.
On the other hand, they may not want to spend a lot on pants that will see everyday wear-and-tear while a boy climbs trees, runs, jumps and is too busy playing to worry about what he's wearing.
You may also pick a fine cotton fabric or something that can take a lot of wear-and-tear, such as brushed corduroy.