Flexible Power Cords

If you want extreme flexibility, then Puritan is the way to go.

For sound quality I unhesitatingly agree on Audio Quest Storm (as high as possible), definitely for amps… I would ignore flexibility on this one). Unfortunately they are not real flexible. Personally, sound quality is way more important to me than flexibility.

Most of my power cords are Transparent. The are reasonably flexible. 

Learn to build them yourself.  It's great fun choosing the components and building them just the lengths you want.  I have been doing it for years,  DHLABS Encore and Power Plus are both very flexible and available in bulk, they make excellent power cords, and you can save a lot of money. 

Many other options available for the DIYer.

It's interesting that Audio Envy provides this comparison, but they did not disclose the size of the wire they use for the power cable. Does anyone happen to know?

https://audioenvy.com/store/technology/

Morrow Cables. Very very supple.  I want from AQ to Acoustic Zen to Nordost to Morrow. Happy with the Morrow sound. And I’m using mid level MAP3s. With my morrow ICs and speaker cables, I’ve notice a positive benefit each time I climbed the ladder.