Synthetic, merino or bamboo. Which are the best thermal clothing base layers?
![Synthetic, merino or bamboo. Which are the best thermal clothing base layers?](https://i0.wp.com/www.twoblondeswalking.com/wp-content/uploads/2019/08/B1-B2-Isobaa-Merino-Dartmoor-2.jpg?fit=600%2C450&ssl=1)
Fi Darby (Blonde Two) is an adventure and outdoor writer based in Devon. Fi specialises in walking routes, gear reviews and outdoor tips. The outdoor market is growing. Don't ignore it. Get in touch with Fi today to find out more. If you hibernated through January, now is the perfect time to turn your thoughts
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