Several underwear brands present bright, cheery shades of yellow for the spring and summer. From hopeful yellow to sun yellow, this season’s range of yellow underwear gives us reason to cheer.

Nasty Pig presents its new collection of swimwear briefs for the upcoming summer season. Currently available, the Nasty Pig Shark Bikini features contrast color blocking, body defining microfiber fabric and low-rise cut.

These Jose Parra underwear photos shot exclusively for The Underwear Expert by David Wagner may or may not be safe for work, it kinda depends on your office.

The Nasty Pig Systematic Brief is made from a combination of 95% cotton and 5% spandex and is available in superhero-inspired colors such as blue, green, and red. The Systematic brief features a basic pouch with a traditional fly opening and contrasting piping around the pouch and leg openings.

Nasty Pig updates its collection of core jockstraps with two new colors for the spring season. Currently available, the Nasty Pig core jockstrap now includes red and yellow in addition to the brand’s standard series of white and black.

For the launch of their new Covert Jockstrap collection, the guys over at Nasty Pig put together Boy Panic, an exclusive photo shoot for The Underwear Expert. Inspired by Duran Duran’s ‘Girl Panic,’ the Nasty Pig Boy Panic shoot shows three studs rough housing in their hotel room after a long day of modeling.

Nasty Pig introduces its new collection of jockstraps inspired by the fabric construction and colors of its popular Systematic jockstraps. Currently available, the Nasty Pig Covert jockstrap collection is offered in black with three choices of accent colors that include white, red and yellow.

Due to popular demand, Nasty Pig re-launches its Systematic collection of briefs, jockstraps and socks. Currently available, the Nasty Pig Systematic collection was first introduced last April and quickly became one of the brand’s top sellers.

The Nasty Pig Long John is the brand’s first attempt into men’s long underwear. The long john offers a new option for men looking for a fashionable and sexy choice to wear during the cold weather. It is made from same cotton spandex rib fabric as the brand’s classic briefs and trunks.

The Nasty Pig fall 2012 campaign features models locked in an asylum while wearing the brand’s newest offerings. The series is titled “Technically Insane.”

Since introducing its first long johns last month, Nasty Pig is attempting to start a new underwear trend. The New York City-based brand is marketing its new pair of long johns to be worn as outerwear.

September has always been an exciting month in the world of men’s underwear as the new releases of fall begin. Check out these sure-fire winners.

Nasty Pig underwear introduces its first ever long john. Currently in stores, the long john features the same classic quality elastic and super-comfortable cotton spandex rib fabric as the brand’s classic briefs and trunks.

Superheroes are awesome. They have superhuman powers, save the world for a living, wear the coolest costumes and are impervious to death. Wanna look just like ‘em? Check out our Superhero underwear picks!

Not one to shy from controversy, Nasty Pig markets itself to the progressive, “sexually-assured man who wears his confidence on his sleeve.” Look through these photos to see exactly what we mean.