Luke M.wrote a review of Topo Designs Boulder Pant - Men's on July 18, 2019
Familiarity: I've used it once or twice and have initial impressions
Fit: True to size
Disclaimer: I was given this product from Backcountry, but this review Is my personal opinion.
The Topo design Boulder pants are a nice climbing/ yoga/ hiking pant EXCEPT for their one flaw. For me, they have a slightly awkward fit.
I have the size Medium and it seems that the waistband sits slightly higher than I'd expect and the crotch is a bit longer than Id like. The Topo Boulder pants have a gusset for added range of motion but I find that it doesn't seem to add much flexibility when doing a center splits. They have a very flat front which makes them slightly uncomfortable. For reference, I am 5'10 and 165lb and typically wear a size 31 x 32. The material is stretchy but not soft like Prana's Zion line which I also own and prefer.
Other interesting design features include the front zipper (even though they have an elastic waist), rear zipper pocket and ankle cuff bands. I don't understand the purpose of a front zipper with an elastic waist band so would probably prefer it not there. The rear zipper pocket is a nice feature but the zipper is a bit big and can be painful to sit on sometimes. Finally, The ankle cuffs don't have any way to secure them so you can tighten it, but it'll work loose over time. This isn't really a problem because they have a pretty skinny fit which means I can roll them up and it stays just fine.
From an aesthetic point I like the grey color with the red accents. The picture in the product doesn't show the colors well but all the adjustments and belt ties are red and the colors look nice.
Overall these are not my 'go to' pants but easily could be with some fitment tweaks that I hope Topo includes on the next generation.