Polartec Alpha has been around for a while now. Rab and other brands do Alpha-insulated gilets which are available for under half the price of the Rapha one:
https://www.evanscycles.com/louis-garneau-alpha-gilet-EV244309
http://www.trekitt.co.uk/493/products/rab-mens-strata-vest-ebony.aspx
no asos?
@amey started
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Polartec Alpha has been around for a while now. Rab and other brands do Alpha-insulated gilets which are available for under half the price of the Rapha one:
https://www.evanscycles.com/louis-garneau-alpha-gilet-EV244309
http://www.trekitt.co.uk/493/products/rab-mens-strata-vest-ebony.aspx