Can I iron Uniqlo Airism pieces?

[MadameSapphire]

Have a few items - some fine to iron but others not (according to the labels). However, the non-iron things get quite creased - is it okay to iron them, wise MNetters? TIA.

I put a tea towel over the top if I iron stuff like that.

Thanks @BobbinThreadbare123 - a good solution! 👍🏼