Funny where reviewing takes you. If it wasn't for the Ribcap Jackson, I'd never have heard of Reynolds' Dilatancy. Nothing to with the tubing company, nor the sort of thing that makes your doctor blush. It's the tendency of various materials to thicken when put under 'shear stress' - what you and I would call impact - and it was first observed by Osborne Reynolds. It's what makes the ingenious Ribcap Jackson effective.
The clever folk at Buff have taken their already brilliant garment and added a thermal polyester fleece section keeping, heads, necks and other body parts warm, yet relatively odour free. In many regards it’s such a versatile garment that comes in handy whatever riding you do. However, those with a good head of hair might find the Polar too warm beneath a helmet.