What's your essential piece of kit?

[e-rider]

eye protection - sunglasses in summer - orange lens in winter or at night

cycle computer - didn't realise how much I needed it until it stopped working!

 

[krakhead]

*adds a whole raft of new thingummijigs to Amazon wishlist*

 

[slowmotion]

I've grown strangely fond of my track mitts with gel pads, even if they are falling to pieces. Somehow I feel a bit vulnerable if I don't wear them. Weird that....

 

[Davidc]

Computer.

Gel gloves/ mitts I just count as essential clothing, as are thermal socks in winter.

 

[BenScoobert]

Topeak X-tool

bagged on ebay for £5 :-)

 

[Kablinsky]

Got to be the bike computer. I lost the sensor on mine about 300 meters into a 100 mile sportive recently. That was a long day. Just couldn't gauge distance or average speed.

 

[snorri]

My wallet.