OMM's SonicShorts is truly ultralight yet will provide a remarkable level of protection from wind and light rain, just like it's jacket and smock counterpart. Features a small key pocket, reflective logo and flatlock seams.
OMM says:
The perfect superlightweight and extremely breathable short. Perfect for wearing as an over short with base layer underwear or over running tights. The PointZero fabric is windproof it also has a DWR repellancy to the fabrics surface making the shorts water repellant and more stain resistant. Superlight, breathable & ultra packable.
OMM's Sonic Shorts pair up nicely with the sonic jacket or smock to provide windproof protection for under 30 grams. As you would expect its a simple garment, however it still manages a a small stow pocket for keys, a reflective logo for visibility and flatlock seams for comfort. The fabric is Point Zero, which is OMM's own fabric which also carries a DWR coating to shed light rain.
I bought one of these to wear while washing my hiking trousers, after a member of my party objected to me walking around in undies while my trousers were hanging out to dry. It's perfect for that purpose. However, it tore when I sat on a rock. Nevertheless I am buying a replacement because it's so light, and takes up very little space in my pack.