“Sleeves” is what we called them. They were plain and ordinary, nothing to think about twice. (Or so I thought.) But now I realize they were unduplicatable.
I still have mine, and a few emotions, dating from my days in professional baseball.
When we wore our sleeves, it was always the best time of the year. We were beginning to feel up.
I laugh at the imitations today. They have pseudo names like “river shirts,” “punting jerseys,” “Henley pullovers.”
Sleeves are, were, and always will be comfortable and engaging to wear; lightweight; warm, not hot; not itchy, not sticky, not fussy. Sleeves are good-looking in the way things are when they aren’t trying to be good-looking.
And you still don’t have to play professional baseball to get one.
Authentic Baseball Sleeves (No. 1949), for men and women. Two-button placket. Made of two layers of good cotton to wick away moisture; outer fabric has minute pores, like pigskin. A little sleeker.

Men’s sizes: S, M, L, XL, XXL.
Colors: Natural and Red, Natural and Navy.
Price: $69