I'd just get thin arm warmers and use them with your favourite short-sleeved top. I like the Prendas knitted ones, or the PlanetX rip offs. https://www.prendas.co.uk/products/prendas-ciclismo-meraklon-special-edition-arm-warmers http://www.planetx.co.uk/i/q/CLPXCOLAW/planet-x-coolmax-seamless-arm-warmers
Decathlon do very cheap LS summer jerseys, but the arms are a bit on the short size for me (6 foot 22 tall, long arms) for my chest size. https://www.decathlon.co.uk/300-long-sleeve-cycling-jersey-black-id_8354155.html
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I'd just get thin arm warmers and use them with your favourite short-sleeved top.
I like the Prendas knitted ones, or the PlanetX rip offs.
https://www.prendas.co.uk/products/prendas-ciclismo-meraklon-special-edition-arm-warmers
http://www.planetx.co.uk/i/q/CLPXCOLAW/planet-x-coolmax-seamless-arm-warmers
Decathlon do very cheap LS summer jerseys, but the arms are a bit on the short size for me (6 foot 22 tall, long arms) for my chest size.
https://www.decathlon.co.uk/300-long-sleeve-cycling-jersey-black-id_8354155.html