Comfort
The PhD bras were the first wool bras I’ve ever worn. I was a little skeptical at first (I thought it might be itchy), but the merino blend is actually extremely cozy. The seamless construction is also noteworthy.

Fit/Mobility
This is a great bra for activities that demand high mobility, like yoga or Nordic skiing, due to the super close fitting, supple fabric. Sizing is standard XS-XL with no adjustability options, so my size M was a little too snug, even with the flexible material.

Functionality
This is a standard over-the-head, tug-it on style bra, with no bells or whistles.

Support
As a 34B, I didn’t find this bra to be supportive enough for high impact activities like stair workouts, running or jumping. Although it is built like a traditional compression bra, the fabric allows too much “give” to be truly supportive. It’s ideal for medium or impact activities that require a lot of movement.

Breathability
Merino is naturally absorbent, but because it is full coverage with no mesh, I did feel sticky after long workouts. Because merino is my top choice for warm-when-wet insulation, though, I thought this bra’s niche was cold weather sports such as skiing or snowshoeing.

Value
This was the most expensive out of the 20 bras we tested at $70. Although it is high on the versatility scale, it lacked the necessary support to give it a high score here.