I received the Martina breeches (XL, storm blue, knee patch) to test and I got a chance to try them out today.
Overall I am very happy with these - the quality is high. The material is substantive enough that they feel like they have compression but also are stretchy enough to be comfortable. The fabric is thick enough to smooth out my thigh a bit, which I prefer! They are still comfortable in the heat (85F / 29C today).
Fit: I love the wide waistband and mid to high rise. The length is a bit short for me - they do not come in different lengths, and I am 5'11" (1.8m). I did size up to an XL since they don't have lengths in this breech, but I could probably wear L. For reference, I wear 30L in comparable pants. I hope PSOS considers adding long/short lengths to the lineup.
Pockets: I would like a thigh pocket in my dream world but they are pretty sizeable in this so they are ok.
Washability: I have them the first wash today and had no issues. They came out as they went in and look perfect! No shrinking, etc.
The seams and other quality aspects are all high. They are flattering and I like the rear pocket detail and euro seat. The belt loops seem strong - the only other change I would add would be a second or third loop on the back. I got the knee patch version since I have young horses and do a lot less sitting trot work vs rising. The button/clasp closure feels substantial.
I would recommend these as a three season breech as a high end, pretty, flattering, and comfortable option.