Never have a problem with uniqlo quality usually, in fact I love it, find it washes brilliantly.
I bought one of the extra-fine Merino wool short-sleeve sweaters a couple of weeks ago, washed it on 30 degree delicate cycle as I usually would, hung it up to dry. Went to put it on this morning and there's a hole the size of my finger tip near the collar.
I have another unworn ultra-fine Merino sweater and want to avoid it happening again! Should I not spin it out? Wash it on wool cycle? Obv it IS wool, but usually they're fine on a 30 degree delicate wash and low spin.
Maybe just a faulty one? Or perhaps a loose thread I didn't see...?