AFAIK there are only two brands making single-layer motorcycle jeans: Rokker and Saint. By single-layer I mean that the protective material is not some kind of internal lining, which adds to the weight and the warmth of the trousers. Do you have any experience with these two? Do you know of others? Saint ( www.saint.cc ) make jeans with Dyneema, a material which is a UHMWPE ( https://en.wikipedia.org/wiki/Ultra-high-molecular-weight_polyethylene ); some of its jeans are level 1 CE-approved, whereas none of Rokker's products are. Saint's CE-approved jeans are in black only; they told me they have no plans to release a non-black version for now. To me, black jeans defy the point of the single layer, which is to have something lightweight for when it's sunny and warm, but of course it's very subjective. Rokker makes the Revolution jeans, with Schoeller's Dynatec fabric and c-change membrane (the Swiss Schoeller makes both): https://www.revzilla.com/motorcycle/rokker-revolution-jeans It is also about to launch the Rokkertech, which are made of an UHMWPE fabric, like the Saint, with no waterproof membrane: http://www.therokkercompany.com/rokkertech/?lang=en https://www.revzilla.com/motorcycle/rokker-rokkertech-slim-straight-jeans The Dynatec fabric was discussed in this forum thread: http://advrider.com/index.php?threads/rokker-original-jean-review.947154/#post-23214447 It is not clear to me if this material is an UHMWPE, an aramid, or what. What I understand so far is that: Aramids, like kevlar, have better thermal properties than UHMWPEs: they have a higher melting point and conduct less heat. This is important because it means you are less likely to get burns from the heat generated by the friction of your butt against the tarmac acting like cheese against a cheesegrater. Revzilla has reports of people who ruined their Saint jeans with the heat from the exhaust of their bikes. UHMWPEs have better resistance to abrasion than aramids. Aramids don't like direct exposure to the sunlight. Companies which don't use aramids say that aramid jeans will lose their protective properties under the sun; companies which use them say that's not true because the aramids are on the interior. What the truth is, I don't know. Bull-it has some charts on the properties of the various materials, but of course that's to be taken with a truckload of salt, as they make their own material which - would you have guessed it? - they claim is superior to both aramids and UHMWPEs.