Deployed every season with changes in the material and details,
BUDS are the pants with flap pockets on the back left and right.

With flaps on the pockets things put in are less prone to falling out and the back style which usually ends up flat
becomes three dimensional because of these patch pockets.
Also this season a ribbed grosgrain fabric is used on the side vertically giving a sharp vertically long appearance from its striped looks.

The name BUDS originates from the
3 stage 30 week long
Basic Underwater Demolition training which the
almighty US special forces, the Navy SEALs,
are required to go through so they can
battle in any environment flawlessly such as the sea, air, or land.

FYI, the WTAPS sweat series named HELLWEEK
originates from the most testing BUD/S training which lasts
5-and-a-half days with a maximum of 4 hours sleep total.
Also the name for the swimwear that gets released only for Spring/Summer, UDT, comes from the Underwater Demolition Teams deployed in WWII which are known to be the predecessors of the SEALs.

Also for the next Autumn/Winter, a slightly different variant will be release. Including those from this season, please take a look with the origin of the name in mind.
These are all items with an originality you would expect only from WTAPS.