I have two, one is a 40 pound vforce max typhoon color that Chris Heria uses and costs $190. This one is great and I love it.
The other is a 20 pound CAP from amazon for $40 bucks. It was a bitch to set up but after it is set up, it’s pretty good.
CAP Barbell (HHWV-CB020C) Adjustable Weighted Vest, 20-Pound https://www.amazon.com/dp/B017O7Q4UG/ref=cm_sw_r_cp_api_KrY5BbP2DMT3X
This is the one I have and can vouch for (after set up of course) but cap has lots of weight options.
I use them both for squats, pushups and pull-ups.
Here is the one I have. It is adjustable, relatively economical, and should work well for walking. A disadvantage is that the strapping system allows it to loosen during activities like running or push ups.
Cool they are a great way to add resistance and the one I bought was well priced too. https://www.amazon.com/dp/B017O7Q4UG/ref=cm_sw_r_cp_apa_glt_fabc_3JCCBCMPNE4CQCGXR3T2?_encoding=UTF8&psc=1
I bought a 20 lbs vest off Amazon for ~50 canadian dollars last year. Price has increased to 62 CAD apparently :
https://www.amazon.ca/gp/product/B017O7Q4UG/
It's basically a vest with a bunch of small pockets and 20 1-pound sandbags.
Get yourself one of these and your set. Work out with your silver :P