I wore the Hot Toddy for nearly two weeks straight while lightweight cycle touring - to test the Merino's odour resistance... really!
I know wool does amazing things to odours but even so, I was really surprised that this top held up to that much repeated wear.
I had it on while riding on cold mornings, under a waterproof in the rain and in the evenings at camp. It stayed warm and pong-free, even when it got damp from sweat.
The Heatwave merino/poly fabric (62/38) doesn't dry as quickly as airy synthetic base layers, but it remained comfortable in a wider temperature range.
The minimal hood is a nice touch, and can be worn under a helmet for extra warmth, but it won't be to everyone's taste.
I did find the material picked up snags quite easily, so take care around Velcro and brambles.