Shalom,
Yes, you still need to check for shatnez, even if the suit is 100% wool cause lining might be from linen and sometimes the lining of the sleeves are from linen and even the threads can be from linen
All the best,
Rabbi Alon Anava
Rivkah bas Tzedakah – Immediate recovery!
Chaya Shaina Chana Bas Itcha – Health
Devorah bas Sarah – Health
Menashe ben Khanom – Health
Yoel ben Menya – Health
Ovadia ben Levanah – Health
Chaya Rachel Devorah bas Leah – Health
Rav Chaim Cohen ben Blanka – Health
Rav Michael ben Rachel – Health
Ester bat Miriam – Health
Marganit Devorah Namoi Joseph Bat Rifka – Health