armwarmer
nounUK /ˈɑːmˌwɔːmə/
US /ˈɑːrmˌwɔːrmər/
A tube you wear on your arm to keep it warm.
She pulled her armwarmers up over her elbows before going outside.
OTHER MEANINGS
2. A knitted or stretchy cover worn over the forearm and wrist, often with a thumb hole.
The dancer wore black armwarmers with a thumb hole.
3. A protective pad or band worn on the arm in sports.
The archer adjusted his leather armwarmer before the shot.
4. A decorative band worn around the upper arm.
Her gold armwarmer sparkled at the party.