Dhb merino sleeveless base layer m 150a lightweight superfine merino base layer will bring comfort to your ride providing you with thermal regulation and natural performance merino wool is a versatile fabric that has a soft itch free feel and natural wicking properties dhbs merino m 150 base layers are made from high quality superfine grade 185 micron merino wool compared to synthetic fibres merino can absorb a greater amount of moisture before feeling wet as it quickly evaporates w