Memorial Day Weekend is heralded as the unofficial start of summer where people celebrate the warm weather by barbecuing and having rosé-fueled picnics. To leather enthusiasts the holiday weekend is special for another reason—the International Mr. Leather (IML) conference and contest.

Nearly 20,000 visitors attend the gathering in downtown Chicago every Memorial Day weekend. The convention includes a Leather Market, the annual IML competition and the Black and Blue Ball closing event on Monday night. Scroll through below to see the some of the best beefcakes and leather daddies at this year's gathering.

This is #IML (thank you @daddyersin)

A post shared by Justin Russo (@justintrusso) on May 28, 2017 at 7:13pm PDT

@terrysphots helping us out in the #IML booth.

A post shared by Mr. S Leather (@mrsleather) on May 29, 2017 at 6:43am PDT

#instaselfie #instadaily #instagood #instagram #instagay #morning #morningmotivation #gym #gymrat #goals #gainz #gay #muscleup #fit #fitfam #fitness #bodybuilder #bodygoals #bodybuilding #iml #chicago #leather

A post shared by Oscar Bear ? (@ciudadano1974) on May 28, 2017 at 3:52pm PDT

Well... what can I say... Happy #IML 2017 ! ? ? Leather by @vleathergear ?

A post shared by Betito (@spbeto) on May 29, 2017 at 4:07am PDT

Great Family Reunion with Mat Bunch and Matt Garrett! #IML #Chicago #HOB

A post shared by Derrick Lincoln Adkisson Weir (@dalw9131) on May 29, 2017 at 2:39am PDT

Met these sexy men on the way out of @smartbarchicago #melaninpoppin #blackboyjoy #Iml #IML2017 #LeatherQueen #Queen #Chicago #housemusic #chocolateygoodness

A post shared by Daniel Simmons (@epicdas) on May 29, 2017 at 1:11am PDT

¡Hola amigo! I'm @gerryslattery and that's my #handsome #mcm #bf @spbeto ?? @vleathergear is my biz, I make all your leather gears ?#happyiml #iml #iml2017 #chicago #custom #leather #harness #studs #etsy #furball #gotback #leatherqueen

A post shared by V Leather (@vleathergear) on May 28, 2017 at 11:08pm PDT

Obligatory #IML2017 #PromPics #leather #kink #fetish #beards #GayBeard #InstaScruff #IML #gay #GayTravel #Chicago #GayChicago #InternationalMisterLeather

A post shared by ELLE ESTANOL (@sirellingtonbear) on May 28, 2017 at 8:43pm PDT

Those abs. Clearly, not mine. #IML #Gay #Men #Leather #Harness #Hot #Fun #Hairymen #Bears #Otters #Tattoos #Chicago

A post shared by Darren Lipman (@writingwolf2010) on May 28, 2017 at 5:01pm PDT

Cinderella said it best. "If the harness fits, then wear it." ? • • • • • • #iml #harness #leather #chicago #thebean #somanytouriststhough

A post shared by Spencer Kostielney (@skostielney) on May 28, 2017 at 3:55pm PDT

#Lansburytop #IML

A post shared by Justin Russo (@justintrusso) on May 27, 2017 at 10:59pm PDT

Your #IML contestant #40 is #mrlouisianaleather2017 Ross Ransom :) #iml #iml2017

A post shared by chrisinextremis (@chrisinextremis) on May 27, 2017 at 9:42pm PDT

I'd like to keep it on please! ?? At IML with @thevoiceclint and his husband! ❤️? #woof #torontobarber #torontogay #beard #beards #barber #chicago #iml #fetish #friends #gaylife #gaymen #hotties #harness #muzzel #nastypig #peterthebarber #piggy #sexymen #beardgame #gaymenwithbeards #gaymenwithtattoos #chicagogay

A post shared by Peter Anthony Tertsakian (@petertertsakian) on May 27, 2017 at 6:17pm PDT

Come say hi to us at the @SquirtDotOrg and @GuysSpyApp booth at the #InternationalMisterLeather vendor markets this weekend! We're located on the upper balcony level, so come by and sign up! #gay #GayDating #GayHookUp #leather #fetish #kink #IML #IML2017

A post shared by ELLE ESTANOL (@sirellingtonbear) on May 27, 2017 at 2:07pm PDT

Dreams do come true #IML#terrysphots

A post shared by C (@jollyllama123) on May 27, 2017 at 1:07pm PDT

#iml #imlchicago #chicago #leatherman #leather #leathercommunity #leatherfetish #fetish #gay #gayleather #bw #blackandwhite #blackandwhitephotography #photographer #kodak #mamiya

A post shared by Jacek Chorazy (@jacekchorazy) on May 27, 2017 at 10:49am PDT

Words cannot describe how much I love my crew. #friends #gayparty #crewlife #crew #partytime #chicagoiml #gayttravel #gaycrew #gayscruff #gayttravel #IML #scruffy #scruffyman #scruffygay #scruffypup #scruff #latinogay #latinobeard #latinoscruff

A post shared by Alex Aponte (@alex_81nyc) on May 27, 2017 at 1:49am PDT

The party is over. #iml2017 #imlawardsceremony2017 #victoryparry

A post shared by Tim H (@musclepilot) on May 29, 2017 at 2:10am PDT

Taking a break to strike a pose ?#IML #IML2017 #AgentFbunny #Fbunny #OnTheProwl #Friends #Bae #TeamSexy #Leather #Neoprene #CustomMade #ThirstTrap #sundayfunday

A post shared by Daniel Simmons (@epicdas) on May 28, 2017 at 3:26pm PDT

The look for pecs and personality. #IML2017

A post shared by Mr. Louisiana Leather 2017 (@louisianaleatherdaddy) on May 28, 2017 at 10:19am PDT

Yellow and good morning IML! #iml #mrsleather #iml2017

A post shared by Pup Amp (@pup_amp) on May 27, 2017 at 9:01am PDT

To the puppy mosh with the Sir #iml39 #puppymosh

A post shared by Patrick Lp (@pleep1) on May 27, 2017 at 5:38pm PDT

Day 269 of 365 days of MRWL 2017!!!! So proud of what I have presented and what I have done. I'm myself and I am humbled by my entire experience thus far!!! #IML2017 #IML39 #IMBB2017 #IMBB25 #MRWL2017 #payitforward #sayhi

A post shared by PupChomper (@pupchomper) on May 28, 2017 at 10:02am PDT

A happy bear and two happy puppies #postpuppymosh #iml39

A post shared by Patrick Lp (@pleep1) on May 27, 2017 at 5:41pm PDT

Another fine IML day with Daddy. Category is: Grey! #mrsleather #puppyplay #pupamp #iml #bondage

A post shared by Pup Amp (@pup_amp) on May 28, 2017 at 10:45am PDT

#iml #leatherfamily

A post shared by Stompy (@scissor_me_timber) on May 29, 2017 at 8:15am PDT

GOTG fantasy unlocked. STARLORD!! #howtokillasuperhero #superherofetish #iml2017 #bluelanterncorps #gaycosplay #authorpablogreene #lgbt? #musclebear #instagay #spandexmen #leathermen #dccosplay #chicagogram #photographyoftheday #chicagophotography #photographylovers #lgbtcosplay #queercosplay #marvelcosplay #dccosplay #gotgcosplay #starlordcosplay

A post shared by Pablo Greene (@howtokillasuperhero) on May 28, 2017 at 4:09pm PDT

Good to see you both!! #dj #djlife #djlifestyle #djontour #djjackchang #iml2017 #fetishparty #fetishdance #fetishcircuit #gay #gaybodybuilder

A post shared by Jack Chang (@changmusic) on May 26, 2017 at 12:21pm PDT