A Present for my bike: what is it?

Lichtblick Posts: 1,434
edited August 2012 in Road general
An elderly relative has bought me a present for my bike, which is very kind of her. However, I don't know what it is. (But have had a wild guess.)

It is made of stiff black fabric.
It is shaped like a right angle triangle.
The point of the triangle is an open hole.
The base of the triangle is a very wide hole.
The hypoteneuse has a zip, but only part-way along.

She thought they were "arm warmers". (Don't be mean, she is in her 80s.)

It was kind of her to go to a cycling shop and spend money, but I wish she'd asked me first.

:? :cry: :?: