Axolom STP Trunks Harness is a soft Breathable Cotton STP Packing underwear. It is a non-functional FTM Packing trunk. It means the trunks keep the dick in one place. It's not movable underwear. The packing underwear features an anti-roll middle “O Layer”. The button fly underwear is made for packing an STP Packer (It can be soft FTM packers or Stand to Pee Prosthetics). Now STP Packer can be used without a harness. Synonyms: STP Trunks Button-Fly Underwear, STP Brief, FTM STP Packing Trunks, FTM Harness.
Introduction:
The Axolom STP Trunks underwear has two layers. The outside layer shows two buttons that allow a person to STP (Stand to pee) in front of public toilets or private spaces through an FTM STP Packer. The inside layer(O Layer) keeps your STP attached to your body. It also has a layer of keeping the scrotum.
A short preview of Axolom STP Trunks:
The STP Trunks Underwear works for specially Thinker, Handy. It also works for other STP packers as well. Some STP packers may not suitable for it. AXOLOM STP trunks harness work with most of our STPs, which have a shaft diameter of less than 1.5". ( DOES NOT Fit the Homerun, Hoodie)

Size Chart:
XS (27"-29")
S (30” - 32”),
M (33” - 35”),
L (36” - 38”),
XL (39” - 41”),
1XL (42” - 45”),
2XL (46” - 49”),
3XL (52” - 55”).

-Wide comfortable waistband, with the underwear itself made from high-quality fabric to last wash after wash
-Button fly opening to easily access the shaft
-Soft fabric-covered O ring to keep the shaft of your packer/STP in the natural hang position.
-Interior elastic loop harness, hold your STP secure and in a natural position. ( Can be cut off if you think it's unnecessary.)
* 100% discreet shipping.
* Orders would be shipped out within 2 working days.
* Order can be canceled or changed before shipping. Please contact service team if you want to make any changes. ( Email: info@axolom.com)
* General shipping time:
-- United States, United Kingdom, Germany, France, Italy: 12-18 days.
-- Other countries and regions: 15-20 days.
* You will receive an email with tracking information when your order shipped out. Tracking info will update in 7-10 days when it arrive the destination country.
PLEASE WATCH AXOLOM PRODUCTS REVIEW VIDEOS ON YOUTUBE BEFORE YOUR PURCHASE! WE REPLACE MANUFACTURING DEFECTIVE ITEMS, BUT NO RETURNS OR REFUND ON WRONG DESIGNS.
The Willie has a firmer feeling silicone compared to the Thinker. Perhaps it is the solid balls, or maybe a thicker silicone.
The Thinker would deform and cause leakage. The Willie, much more forgiving as the solid balls prevent the cup from caving in. I don't use a harness, just tight briefs. Willie can be packed down, but up is my preference.
With any STP If you have backflow try placing the entire unit much farther back and restricting flow. The urine stream should be aimed down the shaft, not into the cup formed by the balls. Hope this helps someone. Also It's very realistic, I love this prosthetic. Feels great overall. Very affirming.
This packer isn't much of a show-er (which I'm fine with), but with gym shorts on it really helps alleviate dysphoria. Once it warms up it's super comfortable, and paired with boxer briefs that hold it in place, it stays really well. I've worn this to the gym as well as during everyday activities, and it's the most comfortable packer I've owned; until I need to use the bathroom I practically forget it's there. And a BIG plus- this is the first one I've had that doesn't set off the alarm at TSA leading to awkward pat-downs. If you're looking for a comfortable everyday wear that's just as great during exercise, this is your guy.
AXOLOM Au Naturel Lifelike FTM Packer -4.3" Shaft Cut
Love it! Its the best one ive gotten ao far!
AXOLOM Hyperon FTM Pack and Play Dildo -- 5.9" Shaft