I like the Ciele caps because you can chuck em in the wash and they come out perfect.
Yes, Decrackalon caps get washed after each run. My dhb (Wiggle own brand) cap has too stiff a peak and a few washes and it's unbearable tight, but the Decathlon ones keep going wash after wash.
I like the Ciele caps because you can chuck em in the wash and they come out perfect. Nice, but pricey.
I have a Salamon XA (recommended on here) and a Buff one which are both great and cheaper but you need to hand-wash them.