Design Philosophy It’s all in the detail with Pro SL and the new version of the Short Sleeve jersey is a perfect example of this. Building on an incredibly popular block, subtle but significant tweaks further improve the fit, performance and appearance of this premium piece. 90 day satisfaction guarantee So confident are we in this product that, if you are not entirely satisfied with it then we offer a no-quibble refund or replacement policy within 90 days of purchase.