The absolute best one I found so far in months:
1)Ultra-Firm Control Shapewear Brief, Seamless Shaping Underwear, 2-Pack Style DFX245
On their main website its the Seamless Extra Firm Control Brief 2-Pack in their shapewear section I will leave a link below.
Links: 1. Cheapest price-amazon: https://a.co/d/f4nfXe3
No difference between 3XL and 3XL-Plus sizes
2. Main seller bali: https://www.balibras.com/seamless-extra-...brief.html
3. walmart: https://www.walmart.com/ip/Bali-Seamless.../173913386
They have these briefs sold at many other websites as well! just make sure to get the DFX245 version from the Dominican Republic
These are amazing for cocoon wedgies (full-body mummyfied wedgie) and atomic wedgies! Just the main big issue is that these briefs are Very Tight! So make sure to get a size 3XL one to feel somewhat comfortable. I am 6'2 and even the 3XL ones feel tight on me hence Extra firm part. But I promise you these have stretch for days!
Only three colors though, white, black and skin(beige) color.
These are priced around 20$-30$ depending on where you buy them. Sometimes they go on sale for cheaper prices around 15$.
2) No Boundaries Micro Brief Panty, Sizes XXXL or 3XL
Link: https://www.walmart.com/ip/No-Boundaries...3620638758
These are a Walmart exclusive pair of briefs which are very cheap and priced at 3$ a pair. They come in pink, black brown, blue and green. I can to atomics and shoulder wedgies with all these. These can rip easily and tear but only a small amount if you get their largest size. Id say these are good for beginner wedgie enthusiasts who want the cheapest and stretchiest underwears good for atomic wedgies.
3. 32 Degrees men briefs Black or White 2XL (not on sale right now)
These ones are not on sale at the moment on their website https://www.32degrees.com/collections/mens-underwear
But they are sold at walmart: https://www.walmart.com/ip/32-Degrees-Me...3923609374
The black ones are the stretchiest and they have a max size of 2XL. Its just these get sold out so fast by every wedgie content creator because of how much stretch they have. I have seen many wedgie content creators use these for hanging wedgies, but they almost always rip but always still hangs for a bit. Again they are not on sale at the moment from they're website, but they usually go for around 4$ with 5.99$ shipping for a 2 pack.
overall
Lastly
4. Skims Fits Everybody: Full Brief 4X size
Link: https://skims.com/products/fits-everybod...brief-sand
The biggest size 4X is a good size to use for atomic wedgies and shoulder wedgies. The regular briefs they have is also good for atomic and shoulder wedgies too. Make sure to get the Fits Everybody brand that they have on sale made of: 76% Polyamide / 24% Elastane.
These are more higher up price though. These sell for around 20$ a pair with 6$ shipping.
To conclude, these are all cheap to medium priced briefs I have found through personally buying them and testing them mainly for atomic and shoulder wedgies. They are all good, but the first one in particular is the best I have found by far the Bali Women's Ultra-Firm Control Shapewear Brief, Seamless Shaping Underwear, 2-Pack. If you have extra cash for a 20$ pair of underwear I highly recommend getting these ones for super fun cocoon wedgies!
Honorable mentions:
Rhonda shear briefs (SEAMLESS LIGHTWEIGHT PANTY BRIEF 1X-3X) are still the best briefs for easy to do atomic, shoulder and frontal wedgies, but might be going out of stock soon you guys bought them all xD (the 3X sizes every other pair from rhonda shear briefs is not that good for wedgies): https://rhondashear.com/products/seamles...0631048294
Macober briefs 3XL are still great for atomic wedgies and shoulder wedgies: https://www.aliexpress.us/item/325680170...pt=glo2usa