Lightweight, race-ready shoes from Bontrager, £199.99
It's not just our blushes these Bontragers spare - it's quite a few grams, by stripping away excess material, ratchet systems, bulky heel cups and the rest of the paraphernalia.
What we're left with is a 200g slipper with a very lightweight synthetic mesh single-seam upper called InForm, bonded to the carbon sole and secured to the foot with three Velcro straps.
For a narrow foot like mine, there's unfortunately a bit of untidy bagging around the front strap. As you would expect, they're not favourite-armchair comfortable, but it's an acceptable trade-off for their light weight.
The RXXXLs are clearly intended as racing shoes only and excel (pun intended) in this area provided they fit you, but they're probably a little spartan for daily riding. Keep them for competition. SS